I use the bed of my truck for work and hauling stuff that will not fit under a camper shell. I also do a lot of solo camping, hiking, and hunting and would love a shell to sleep under. How easy/hard/PITA is it to remove and mount a RSI CAP? If I ever put a shell on the back of the truck I want something like the Smartcap that I can mount stuff on top of (sleeping tent or whatever). My question is it a PITA to take of and put back on???