That's exactly how I get my camper on and off my truck. I built the table the same height as my tailgate so on flat ground it just slide on a off on the runners fixed to the bottom. The table has wheels on it so I can then just move the whole thing around for storage.
To get the camper 'on' the truck I attach a pulley to the front of my tub, pass the winch cable under the camper, through the pulley and back to the camper and winch it on. To get it 'off' I just hook it to the front of the camper and start winching. My camper is a bit smaller than yours but the principle should still apply.
I haven't quite finished the set up yet but will document it in my thread when done. I've bought the boat winch and tested it and it all works ok. I just need to mount it to my table with a roller for the cable and make up the hooks etc. My campers about 250kgs and I bought a 500kg 5:1 winch. It moves it easily.