Could a trailer be light
enough to be towed on the River Road at Big Bend N.P. (which is usually in better shape than the Park Service lets on)? They greatly discourage, if they do not ban outright, the use of trailers there.
And well they should. Consider the logistics of getting a broken down trailer or motorhome out of there.
They reason that they are so strict is that some people have no sense and get in over their head before they know it or worse still never know it. People die in the park more often than most people know.
I have seen low clearance passenger cars stuck on the sand on the river road and sitting in a pool of oil on the ore road where the have holed either the oil pan or the transmission.
Sorry Eric I'll get off my soap box now.