I have a back that goes on me sometimes and when I had 2 KK's, packing up and setting up was fairly easy.
On the KK's, the rack over the top helps to open it up ( lots of leverage ) and on packing up I never pushed the hard top up, I just grabbed the canvas by the scruff of the neck and pulled from the side.
Whatever you look at, make sure you try them out 1st and see which one is easiest.....but with all of them it's heaps easier to have 2 people, even if only for the 1st half of the packup sequence ( 1 minute tops )
No matter what camper it is, I found the worst thing for my back is trying to man handle the trailer around...
The winch idea sounds good, but a well designed camper doesn't really need one ( again, all about leverage and how well they thought about the closing of it )