Is it safe to travel alone?

Yes. Southeast Asia is arguably the safest region for solo backpackers because you are never truly alone; hostels are highly social environments.

Should I book my accommodation in advance?

Book your first two nights, then book as you go. You will meet people on the bus who will suggest better places, and your plans will likely change.

Planning Your First Southeast Asia Backpacking Route

Focus on the 'Banana Pancake Trail' for your first trip, covering Thailand, Laos, Vietnam, and Cambodia over 6 weeks. Stick to one bus or short flight per country to maximize time spent exploring rather than sitting in transit.

Define your loop. Start and end in Bangkok. It is the cheapest air hub and the most established place to find cheap gear, hostels, and travel partners.
Prioritize your pace. Do not exceed two countries per three weeks. Trying to hit five countries in a month results in 'bus fatigue' and high costs due to constant transit.
Use regional hubs for flights. Book internal 'Open Jaw' flights only if necessary. Use low-cost carriers like AirAsia for hops over 12 hours long, but stick to buses or trains for shorter distances to save money.
Account for 'visa days'. Check visa processing times for Vietnam and Cambodia before finalizing your route. Vietnam usually requires an e-visa applied for at least 5 business days in advance.

Is it safe to travel alone?: Yes. Southeast Asia is arguably the safest region for solo backpackers because you are never truly alone; hostels are highly social environments.
Should I book my accommodation in advance?: Book your first two nights, then book as you go. You will meet people on the bus who will suggest better places, and your plans will likely change.