You'll need your passport to enter and exit countries throughout your journey, and it's always a good idea to have photocopies of your passport and visas on hand in case you misplace the originals.
Travel insurance will protect you in the event of an unexpected incident such as a medical emergency, trip cancellation, or missing luggage.
If you intend to rent a car in any of the countries you visit, an international driver's licence in addition to your ordinary driver's licence may be required.
It's a good idea to bring a variety of credit cards and cash in different currencies to pay expenses while travelling.
A cell phone is a useful tool for communication and navigation while travelling, and don't forget to bring a charger as well as any necessary adapters.
A camera is crucial for documenting your trip's memories and experiences, and don't forget to carry any necessary equipment such as spare batteries and memory cards.
Pack lightweight, versatile apparel that may be layered for varied weather and activity conditions. Avoid overpacking and keep any cultural clothing codes for the nations you will be visiting in mind.
Bring comfortable, supportive shoes that are appropriate for walking and trekking.
Bring your necessary necessities, such as sunscreen, insect repellent, and any prescription pills.
Bring a basic first aid kit with you, which should include essentials like pain medications, bandages, and antiseptic wipes.