One more thing to consider.
The fit of my Hawk is so tight (it is only 1/2 inch narrower than my tailgate opening) that it takes me 30 minutes or more to mount - what with backing a few inches, turn the steering wheel a few degrees, back up some more, pull forward a few inches and repeat. I finally figured out the last time I loaded it that I can move the individual jack legs a little in order to move the camper, rather than try to re-position the truck underneath it for the umpteenth time, so I may be able to mount it faster the next time. Also, much of the stuff I keep under the couch needs to come out in order to reach the passenger side turnbuckles. Because I have another vehicle to use as my daily driver, the camper stays on the truck almost all the time.
When it comes time to break camp, I can pack everything I took out and roll up the awning faster than I can put the camper on my truck. I frequently camp with a buddy who has a plain old shell on his truck, and I'm usually ready to leave before he is.
With that said however, I have a friend with a FWC who keeps a pair of the "X" frame supports shown in the thread that Rockjok referenced (just like the ones FWC uses at their factory and trade shows) that he stows in the bed of his truck, under the FWC so he can leave the camper behind at any given location. He also frequently takes the camper off his truck, so he's more proficient at putting it on than I am.