*scratching chin* i am with massyWV, garden tractor and a trailer fully loaded, and any sort of hills, or mud, or slippery grass, and you may be stuck, with the heavier trailers. ATV, i have no idea. i say get el-cheap 100 buck +/- 30 bucks. for garden tractor. that has a pin you pull to let it dump. just be careful and do not have any body parts near trailer when you pull pin, due to trailer will suddenly and violently nail you as it swings. and you may need a hammer and another bolt or like to tap the pin out, when trailer is fully loaded. or pair of channel locks if it uses a lever to hold trailer, and keep it from dumping.
on a different note, i did not see any trailers, that had an "actuator" = the electrical version of (hyd pump, hyd oil, and a cylinder).
the hand operated dump trailers look nice, no need to figure out how you will run wires directly off of battery, for an actuator, or were to mount and hook up a hyd pump. just a lever (kinda like a floor jack) to contract or extend cylinder to cause trailer to dump. and no body parts just waiting to get nailed for them cheap trailers that you just pull a pin.
