Dropping camper on sloped driveway

This is how I did it one time. I made four wooden blocks that were higher in the front such that when placed on the slope they were level to the ground and level from the back blocks to the front blocks. I backed up to where I wanted the camper to sit then placed metal ramps, the kind you drive up on to change oil, behind the front wheels. When I backed up, the front of the truck raised to a level position which also leveled the camper. I positioned the blocks and lowered the camper jacks onto them then raised the camper off the truck. I pulled forward just far enough to clear the ramps, removed them and pulled away. Do the reverse to reload. It's a royal pita, but it works. Note: Mark the location of the ramps before removing them. It makes it easier to position them when reloading. Also, you can fine tune the position of the camper in the truck bed once you are on level ground. You might also do the same thing with a good heavy duty floor jack, but I've not tried that.