Do we really need to pack for cold weather in South America?

Yes. Overnight buses through the Andes run the AC like a freezer, Patagonia gets down to 30-40°F even in summer, and high-altitude cities like La Paz and Cusco are cold at night year-round. Pack at least one warm layer each plus one to share.

Should we bring a camping stove or cook our own food?

No unless you're doing a specific camping trip. South American restaurants and markets are cheap enough ($3-8 per person per meal) that carrying cooking gear isn't worth the weight or hassle for most couples. Hostels with kitchens are common if you want to cook occasionally.

Can we share one phone and skip the second one?

Bad idea. If you get separated in a city like São Paulo or Buenos Aires, you need to be able to contact each other. Both phones also means backup navigation, backup photos if one dies, and the ability to split up for errands. Bring both, get local SIMs for both.

How do we pack if we're doing both cities and multi-day hikes?

Base your packing on the hikes (layers, trail runners, technical gear), then add one nice outfit each for cities. Leave the hiking-specific gear (trekking poles, sleeping bag if you rent) in hostel storage while you do city days. Most hostels offer free storage for multi-week travelers.

What if my partner packs way more than me?

Have a pre-trip packing session together. Lay out everything you're both bringing and make cuts as a team. Set a weight limit (40-50 pounds total for both of you) and stick to it. The person who wants more stuff carries more weight. Reality kicks in fast on cobblestone streets.

Pack for South America as a Couple

Pack for South America as a couple by coordinating one large checked bag and two carry-ons, choosing versatile layers for multiple climates (you'll hit 40°F mountains and 85°F coasts), and splitting essential items between both people so a lost bag doesn't ruin your trip. Share bulky items like toiletries and chargers to save space.

Split your luggage strategically. One person takes the checked bag with shared items (toiletries, first aid, chargers, guidebooks). Both carry personal backpacks with 3 days of clothes, medications, valuables, and one complete outfit for the other person. If one bag goes missing, you both have what you need to keep moving.
Pack for three climates in one trip. Most South America itineraries cross climate zones. Pack a base of quick-dry layers: 2 pairs of pants (one convertible to shorts), 4-5 shirts, 1 fleece, 1 rain jacket, 1 sun hat, 1 warm hat. Add one nice outfit each for dinners in Buenos Aires or Lima. This works from Patagonia to the Amazon.
Share the heavy stuff. Only pack one of these: sunscreen bottle, insect repellent, shampoo, first aid kit, travel towel, guidebook, power adapter set, headlamp. Put them in the checked bag. This saves 4-6 pounds across your luggage.
Coordinate colors to share clothes. If you're close in size, choose neutral colors (black, navy, gray, olive) that either person can wear. A fleece or rain jacket becomes a backup for both of you. Doesn't work for everything, but helpful for layers and outer pieces.
Pack dual-purpose shoes. Each person: one pair of broken-in walking shoes (worn on plane), one pair of sandals or casual shoes (in bag). For Patagonia or Andes hiking, add lightweight trail runners. Skip dedicated hiking boots unless you're doing multi-day treks—trail runners handle most South American terrain and pack smaller.
Build your document system together. Each person carries their own passport, but split other documents. One person keeps the reservation printouts and insurance cards, the other keeps backup credit cards and photocopies of passports. Store one complete set of digital copies in a shared cloud folder both can access offline.

Do we really need to pack for cold weather in South America?: Yes. Overnight buses through the Andes run the AC like a freezer, Patagonia gets down to 30-40°F even in summer, and high-altitude cities like La Paz and Cusco are cold at night year-round. Pack at least one warm layer each plus one to share.
Should we bring a camping stove or cook our own food?: No unless you're doing a specific camping trip. South American restaurants and markets are cheap enough ($3-8 per person per meal) that carrying cooking gear isn't worth the weight or hassle for most couples. Hostels with kitchens are common if you want to cook occasionally.
Can we share one phone and skip the second one?: Bad idea. If you get separated in a city like São Paulo or Buenos Aires, you need to be able to contact each other. Both phones also means backup navigation, backup photos if one dies, and the ability to split up for errands. Bring both, get local SIMs for both.
How do we pack if we're doing both cities and multi-day hikes?: Base your packing on the hikes (layers, trail runners, technical gear), then add one nice outfit each for cities. Leave the hiking-specific gear (trekking poles, sleeping bag if you rent) in hostel storage while you do city days. Most hostels offer free storage for multi-week travelers.
What if my partner packs way more than me?: Have a pre-trip packing session together. Lay out everything you're both bringing and make cuts as a team. Set a weight limit (40-50 pounds total for both of you) and stick to it. The person who wants more stuff carries more weight. Reality kicks in fast on cobblestone streets.