Note, however, the floor of the camper is not supported well enough to go inside while the camper is on corner jacks, if you did't already know this. That's why many of us who take ours off for the winter have built a platform dolly to support the camper from the bottom while off the truck.
When I went to pick up my new Hawk from my FWC dealer a few years ago, it was supported on corner jacks with nothing under the floor. The dealer invited me to go inside the camper while they installed eyebolts in my truck bed. I was a bit surprised, having read here that wasn't a good idea, so I said, "I thought the floor won't support my weight." He said, "Oh, it'll support you, no problem." So I carefully went inside, and sure enough, I didn't feel anything give or move. Still, that's the only time I've ever been in it without the floor supported - when it's off the truck, I keep it on a dolly. Just in case I ever feel like doing jumping jacks in the camper. 8^)