FBD,
Nice trailer with lots of doors to reach things through. Not sure how I will build the box yet but all of these pictures gives me plenty of usable ideas. I realy like the simplicity of a pop up lid with a hinge along one side though. Solves the problem of getting a door to seal all of the elements out.

Fred,
Thanks for the advice on nails/screws. On the frame and floor I plan on using wood screws and gorrila glue. The thin 1/4 ply to the frame I plan on using the brads and nail gun with the gorrila glue. The glue holds the parts together the brads are just used to keep the glued parts in contact until the glue sets up. Forgive the pun but the gorrila glue is tough as nails or tougher! The gorrila glue is used in construction of many things including ultralight and experimental aircraft. Again thanks for the reply and helpful advice, keep the information flowing!

JEB