When you are traveling you don´t need to take big bags and things. If you travel only with a medium backpack you will feel very free and not so preocupied with your bagage as if you travel full of bags and weight. I have seen many travelers traveling with big backpacks, bags and trolleys and they had always a problem when they had to move. Please keep it simple and light for the good of your trip.
- Backpack or Shoulder Bag: small, simple and light but resistant.
- Money Belt: It provides security from theft, and this is where your most important items go: Passport, ATM/Credit Cards, Cash/Traveler's Checks, Tickets, etc.
- Clothes: you don´t need to take many clothes. You can washe them or buy cheap clothes depending on where you are.
- Personal Items: hygiene products, camera, book, pocket knife, mp3, guide book, mosquito repellent, small flashlight, etc
If you like to walk around and go to distant countries a backpack is the best to take. It´s safer, and you can havea good mobility to walk, visit or travel to other places. I think the backpack is very important if you go travel for some months.