Back to the OP's original concern of bending over...
I went out to get my trailer this morning and having read this thread, I paid particular attention to how much and how many times I had to bend over just to hitch up the trailer. The biggest deal was bending over or getting down on my knees to hook up the safety chains and there's just no way around that. The steps (which I have to bend down to deploy due to a "door mat" attached to it) is minor compared with attaching the safety chains. When I got home I had to add air to both tires which necessitated bending over. I don't have gray- and black-water tanks so can't address that issue but am sure that it involves bending the knees to access the valves. My point is (as mentioned above) that the steps may be minor compared with hitching and unhitching the trailer.
But maybe all these issues are solvable by just taking the first step with the steps.