I found a frame with which to build an expedition trailer. It's pretty solid, as it used to pack around a 500 gallon water tank. The hubs will have to be changed first, as they are the old mobile home type. I was thinking of building with wood, as I have no ability to weld or fabricate metal. This particular trailer is 51.5" wide between the wheel wells. I should be able to get a full eight foot box, plus an additional couple of feet tapering in along the tongue. I'm new to this site and see some pretty serious builds by some very talented people. I'm not one of those. I know just enough about building with wood to be dangerous. At any rate, over the next month or so, my kids and I will design some sort of wooden structure. Anybody that has some suggestions, please fire away.