Thanks for all that information. We appreciate your goodwill. To respond -
Yes, it's the chain that goes between the trailer and truck. Because of where it attaches to the truck, it's necessary to get under the bumper. That's the main issue. Ours have carabiner-type closures. We thread the brake wire into the chain before attaching it.
We use kneelers when we need them, like fiddling with tank connectors and so on, but for this, he has to get under the bumper on his back, so the kneeler isn't much use.
Our WD apparatus is in the form of bars with a curve at one end and a heavy chain at the other. They have to be lifted so the curved end fits into a receiver, then swung around and chained at the other end. Sorry if I mislabeled them as hitches.
These are all good ideas. Thanks for sharing them.
As for the post being removed, I was unaware that things can't be sold here. Seems silly, but OK. But my post was primarily to thank everyone for their help. After someone reported it without contacting me first, I edited it, but it was still removed, again without any notification to me. That's just rude and counter-productive. Unless the PTBs here assume that their members are deliberately trying to circumvent the rules, they could have either assumed that it was an innocent error or confirmed it by asking me. Neither of those things happened, which creates the impression that they don't trust their own members. How hard would it have been to let me know that I'd violated the rules?
Anyway, thanks for all the suggestions! As I said in my original post, people here have been very helpful to us.