You've picked a great trip. Luggage is largely a matter of personal choice. I personally use a good quality lightweight wheeled suitcase for my main luggage. I find the newer four wheeled ones are much easier to maneuver round busy airports. There are a number of internal flights on this trip, so when you pack, remember the weight limit for those will be less than for your long haul flights. I wouldn't argue with Bob's comments on hand luggage, but again it's what you're comfortable with. I don't like backpacks, just cannot get on with them. I use a very small lightweight wheeled cabin bag, with a small shoulder bag for medicine, passport, money, and cameras. Again, it's what works for you, but do bear in mind that you may have to tow/ carry luggage fair distances at some airports, or even carry hand luggage up steps onto aircraft at some provincial airports. Have a wonderful time