What if we're different sizes and can't share clothes?

You still share toiletries, electronics, guidebooks, and gear like rain shells and first aid. Even if no clothes overlap, consolidating non-clothing items cuts 20-25% of total pack weight. Focus on eliminating duplicate charging cables, adapters, and full-size toiletries.

Should we bring hiking boots for Patagonia or Machu Picchu?

Bring trail runners instead. They work for 90% of treks, dry faster, weigh half as much, and double as walking shoes in cities. Only bring boots if you're doing multi-day backcountry camping in Torres del Paine or serious mountaineering. The Inca Trail and most Patagonia day hikes are fine in trail runners with ankle support.

How do we handle laundry with one shared bag?

Wash clothes every 4-5 days. Most hostels have laundry service for $3-6 per load. Hand-wash underwear and socks in the sink every 2 days with laundry soap sheets. Pack quick-dry fabrics (merino wool, synthetic). Never pack cotton t-shirts — they take 24+ hours to dry in humid climates and you'll run out of clean clothes.

What if the checked bag gets lost?

You can survive 2-3 days from your daypacks if you packed smart: each person has underwear, one shirt, medications, and phone charger in their personal bag. Never put both passports or all money in the checked bag. Buy replacement clothes in the first city if needed — most South American cities have cheap local markets. File a baggage claim immediately and keep the reference number.

Do we need sleeping bags for hostels?

No. Bring a silk or cotton sleeping bag liner instead (weights 200-300g vs 1,000-1,500g for a sleeping bag). Hostels provide blankets. Liners add warmth in cold highland hostels, protect against questionable bedding, and work as a sheet in hot coastal cities. Only bring a sleeping bag if you're camping independently.

Pack as a Couple for South America

Share one checked bag and each carry a personal backpack to save money on flights and move faster. Pack layers for altitude changes, a rain shell for jungle and mountain weather, and consolidate toiletries and electronics to cut weight by 30-40% compared to packing separately.

Choose the one-checked-bag system. Book one checked bag between you (most South American airlines charge $30-60 per checked bag each way). Use a 65-75L backpack or convertible travel pack. Each person carries a 20L daypack as personal item. This saves $120-240 in baggage fees on a typical 3-week trip and makes bus transfers and hostel stairs much easier.
Pack shared base layers in the checked bag. Put shared items in the checked bag: toiletries (one set, not two), first aid kit, laundry soap sheets, one universal adapter, one portable charger, guidebook, and bulk items like sunscreen. Add clothing you both need: rain shells, fleece layers, one nicer outfit to share if sizes allow. This cuts redundancy and keeps weight down.
Each person carries critical items in their daypack. Your personal backpack holds: change of underwear, one shirt, medications, phone charger, passport, wallet, water bottle, snacks. Never put both passports in the same bag. Never put all money or cards together. If the checked bag goes missing, you can function for 2-3 days from your daypacks alone.
Layer for 0°C to 30°C temperature swings. Pack for extreme range. La Paz in July hits 0°C at night. Cartagena is 32°C year-round. Buenos Aires swings 20 degrees in a day. Each person needs: 2 t-shirts, 1 long-sleeve, 1 fleece or puffy jacket, 1 rain shell, 1 pair warm layers (leggings or long underwear), shorts, pants, 4 underwear, 3 pairs socks. Wear bulkiest items on travel days.
Add gear for altitude and Amazon. If you hit high altitude (Cusco, La Paz, Quito), bring acetazolamide (Diamox) and electrolyte packets. Altitude hits above 2,500m. For jungle trips, add: insect repellent with 30%+ DEET, anti-malarial if needed (consult travel clinic), long sleeves and pants in light fabric, headlamp. Leave the jungle gear in your checked bag if not needed yet.
Consolidate electronics to one charging kit. Bring one universal adapter (Type C for most of South America, Type I for Argentina), one multi-port USB charger, one portable battery pack, two charging cables. Share the adapter. Many hostels and budget hotels have only one outlet per room. One person manages charging, keeps cables organized in a small pouch.
Test weight distribution before you leave. Load the checked bag. Walk around your block with it. If it feels heavy at home, it will be unbearable after a 14-hour bus ride. Target 12-15kg for the checked bag. Repack. Cut items. Hostels have laundry. You do not need 10 days of clothes.

What if we're different sizes and can't share clothes?: You still share toiletries, electronics, guidebooks, and gear like rain shells and first aid. Even if no clothes overlap, consolidating non-clothing items cuts 20-25% of total pack weight. Focus on eliminating duplicate charging cables, adapters, and full-size toiletries.
Should we bring hiking boots for Patagonia or Machu Picchu?: Bring trail runners instead. They work for 90% of treks, dry faster, weigh half as much, and double as walking shoes in cities. Only bring boots if you're doing multi-day backcountry camping in Torres del Paine or serious mountaineering. The Inca Trail and most Patagonia day hikes are fine in trail runners with ankle support.
How do we handle laundry with one shared bag?: Wash clothes every 4-5 days. Most hostels have laundry service for $3-6 per load. Hand-wash underwear and socks in the sink every 2 days with laundry soap sheets. Pack quick-dry fabrics (merino wool, synthetic). Never pack cotton t-shirts — they take 24+ hours to dry in humid climates and you'll run out of clean clothes.
What if the checked bag gets lost?: You can survive 2-3 days from your daypacks if you packed smart: each person has underwear, one shirt, medications, and phone charger in their personal bag. Never put both passports or all money in the checked bag. Buy replacement clothes in the first city if needed — most South American cities have cheap local markets. File a baggage claim immediately and keep the reference number.
Do we need sleeping bags for hostels?: No. Bring a silk or cotton sleeping bag liner instead (weights 200-300g vs 1,000-1,500g for a sleeping bag). Hostels provide blankets. Liners add warmth in cold highland hostels, protect against questionable bedding, and work as a sheet in hot coastal cities. Only bring a sleeping bag if you're camping independently.