My dad (an ex U.S. cavalryman from the days when they still had horses) suggested that I clean his feet "cavalry fashion". They did EVERYthing from the left side, they reached through and cleaned the horse's two right feet from the left side.
I took it one step further and cleaned his RIGHT feet from the left, and his LEFT feet from the right. He tried to lean on me a couple of times, but he fell over (you've never seen such a shocked horsie!) After that, he quit leaning on me. He was sweet but dumb - I don't think he ever quite figured out how I made him fall over.
I have occasionally assisted a recalcitrant horse to load on a trailer by joining forearms with a confederate and LIFTING said horse's butt into the trailer . . . but my current trainer prefers to use a longe line and a broom . . . fortunately my mare is an easy loader. She used to be a broodmare, and optimist that she is, she figures that there just might be a stallion at the other end of the ride. . .
I use to have a pony that was horrible about that. I think some of his problem was because he was so small. We use to prop him up by the house when we shoed him so he wouldn't wear out the shoer. It worked pretty good, insted of leaning on the shoer he rested on the house.
Yeah, I like the long lung line better then lifting on in the trailer, and the ones that get in by themselves are the best. If my husbands horse gets near an opened trailer door she just gets in. It's so nice.