Go to a big drug store and buy anything and everything that can give you creature comforts, like lotions for blisters, sun block, insect bite stuff, advil, waterless hand cleaner,mouth wash, shampoo, antacids if you need them, etc. Get some small jars or vials so you take just what you need, because if you have to buy any of this stuff on the road it will be way too much, and expensive. But leave the performance enhancing substances at home