I had planned to build a pivoting log arch on mind, essentially a pair of hinge points on top of the railings, with a U-shaped hoop that would pivot fore/aft, and a snatch block in the middle of the hoop to lift logs off the ground and onto the trailer. But I never got around to it, and with a 7500 winch, brute force has a way of making things work. The only flaw in my system is the expanded metal tailgate takes a beating.
I try to keep a sheet of old plywood handy to throw between the tailgate and oncoming log, but getting the log up onto the plywood can be a bit of a thing, and keeping it from sliding out is a little bit of a hassle.
BTW, that trailer really was not very expensive. I think it was only $3600'ish back in 2016 or 2018. I did spend several hundred more on the winch, big batteries, and other accoutrement, maybe under $4500 total investment. Lots less than a tractor!