Keep looking I sure you find one that will cover your needs. In the meantime let me teazzze you with this Build Thread. It is not a Cargo Trailer conversion, but is being built for off road.
Silverstreaker, welcome to the forum, from truely sunny, Southern Caifornia. It looks like you might want to go for an off-road cargo trailer, or perhaps alter a cargo rig to handle the rock strewn creek beds. With my woody, the extent of my off roading is when I am backing onto the grass from the asphalt roadway. There are a bunch of cargo trailers available, take your choice. This is a wonderful site for all kinds of info, all you have to do is ask. Good luck. Roly the li'l ol woody guy
Thanks for the welcomes. Was out yesterday looking for a used enclosed trailer and made the mistake of stopping at a RV lot with the family. Some really nice small campers and I picked up a few ideas but luckily the prices were too high so I was able to keep my wife convinced that this is the route to go.