Hi There! I am looking at going to the Everest Bas Camp and then a few weeks through India and am trying to work out what sort of Trek bag I should buy! 70lt, 80lt etc, with or without a daybag?. I live in Australia and there are many stors such as Mountain design and Kathmandu but there are also a heap of stores on line. So can anyone point me in the direction of what I should be looking and obviously don't want to be spending HUGE amounts of money but reasonable money. Additionaly, how do backpacks go with Kg's luggage. Obviously I will be flying to Luklo but also flying throughout India so the amount of KG's in baggage is also a concern. Many Thanks in advance.