I put a truck cap on a utility trailer. It has 8 ft tool boxes on the sides and a lot of storage capacity on the inside too. Everywhere that is black is actually a door to the inside of the trailer for easy access.

This is a track sled made out of an old snowmobile, lawn tractor, and lots of parts from princess auto. It was designed for packing snow in the winter to make trails usable, all year round.