Dora-Lee,
As all above have said, document each step. With pictures (from a digital camera) before, during and after each step. This way when it starts to go back together you'll have some sort of reference. Tag and Bag is a great way to account for everything that comes off the truck even if it's not an original piece. Take one system or element of the truck and work it through. Don't do like I did the first time and completely disassemble the truck with raw abandon. (I still have a big crate of pieces that I have know idea where they belong.) It will be a great adventure and have fun. Welcome and enjoy the fabulous family here at the Stovebolt.
Mitch