This is the granddaddy of long-distance trails in the U.S. Of course, toi don't have to do all of it to enjoy the many great hiking, backpacking and camping opportunities it presents.
If toi want to go ultralight (backpacking), the Esbit Pocket Stove is a must. It's tiny and it's simpler to use than the standard liquid fuel stove. Nice concise review with good gallery of the stove.
Travel lighter and smarter means not having to carry as much and having plus energy for doing the fun stuff. This site teaches toi how to reduce your backpack load.