I always have fought rear wheel install; trying to get the brake caliper in, the spacers on , everything to go all at once
today I figured out a better way. At least better than I've tried before.
First thing i zip tied the brake caliper in place. Then I put a couple 2x4's down to roll the wheel in on. Then hook the chain on the sprocket. Then place the spacers in while lowering the wheel into place from above by working out a 2x4 and easing the wheel down. have to guide the rotor into the caliper at same time but with the 2x4's and coming from top down it didnt work bad.
There's probably a better way but this worked much better than many previous attempts.
I've had an idea about that for a long time. A two prong fork under the rear tire with a fulcrum under it. Several different weight rubber bands could be supplied and one could be looped over the stand handle and the fork handle. The idea is to lever it up just past the axle then you can push down on the tire stretching the rubber band until it all lines up.