My two cents worth... We have a 2011 13' Scamp
which we take mostly on paved or compacted dirt or gravel roads. We, unintentionally, had to take what looked like an OK paved road (on the map) in Washington state which turned out to be riddled with largely "invisible to the eye" potholes. The road was in and out of sunlight which made visibility poor. There was no turning back once we started on the road. We drove cautiously and relatively slowly.
Upon inspection the outside seemed to be OK but we found that the door to our cooler had broken fiberglass at the hinges. In addition, the cutlery drawer front fell off. We found a long screw on the floor and never found out where it belonged originally. As you might imagine, bungy cords did NOT do an adequate job of keeping cabinets closed in this situation and stuff was strewn everywhere.
Scamps, in my mind, are of "middle of the road" (pardon the pun) construction. They are not made to take rough abuse. Personally, as much as I love our Scamp
, I would choose a rugged trailer made for off-road use, in your case, rather than trying to modify a Scamp