Well, make it easy. Camp out in your own back yard with what you put on the bike. If you really need something you can go get it and revise you packing list. If you don't use something, remove it from the list. Do that in the sun and rain and cold and hot and you'll be ready for the BIG ADVENTURE!
Practice setting up and taking down the tent, doing all your meal prep, your bathing out of a canteen's worth of water, etc. Let your bike lay on it's side occasionally so you'll know how to pick it up.
Doing it at home is a lot easier than learning the hard way!