I think we got off the topic of this post as always. Nobody's hating about those with enclosed trailers or what amenities they have in them. The op asked about open trailers
We started karting out of the back of my pickup
My son and I when he was 8 built a diamond plate, gas shock assisted lift tonneau cover and the kart sat on top on a rail like a kart stand, could lift the top with the kart in place.
Ez up and the tailgate made a great work bench.
When he was 10 we built a small 5x8x2ft tall box out of an old utility trailer, kart on top, everything else stored inside underneath, idea came from a buddy that had a very old Sears tent camper, tent part was gone, but a very cool box was there, he had a tarp made that snapped on and covered the kart, painted black and graphics on the sides, made it
, camper below.
First enclosed trailer we had started as a tractor supply axle and fenders, and a pile of steel, with some parts from a local enclosed trailer plant, was a 6x12
Looked factory when it was finished.
Best one we seen was a scaled down version of an open late model trailer, I talked with the dad and almost built one.
Didn't really care about any of it, but it allowed plenty of son time alone, and taught him things he uses today in his profession, he learned that races were won an lost in the shop and the effort you put in.