dangerous with tools
Join Date: Aug 2004
Bikes: fat, long, single & fast
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Assuming you're following a more-or-less straight line, water is about the least of your worries... Though you may want to invest in a filtration system so you can drink from the multitude of rivers, streams and creeks that you will cross.
For food, what do you like to eat? What can you afford? If you're planning on camping, buy a couple days worth of groceries as necessary. I prefer grocery store stuff to freeze dried 'camping' food. The grocery store stuff tends to taste better and cost less. If you have the money for freeze-dried, you may as well eat at restaurants every day.
For gear, use what you have. I recommend aiming for lightweight to ultralight packing, but feel free to compromise for your comfort as necessary. Ray Jardine has written a bunch on the subject for backpackers, particularly in 'PCT Thru-hikers handbook.' Most of the same theories will apply to bicycling. Otherwise reference the links above, plus adventurecycling.com.