A 30 footer on a two track trail? You have a lot more courage than I do -- it can be really hard to find a good place to turn around, even with my little trailer. (The box itself is just under 12 feet long, or should I say 12 feet short?)
But many trailers can be towed on bad roads. Just take it really slow -- bad impacts can tweak the frame. Use tough components when you flip the axle. Lock the drawers and cabinets. Watch those overhanging branches, too.
2012 Fun Finder X-139 "Boondock Style" (axle-flipped and extra insulation)
2013 Toyota Tacoma Off-Road (semi-beefy tires and components)
Our trips -- pix and textAbout our trailer"A journey of a thousand miles begins with a single list."