Your options for tie downs are Happijac and Torklift. Either will work.
You'll need the spacer to clear the FW rails. You'll need dually swing out brackets on the camper to clear your wheel wells. The size camper you're looking at should have them anyway.
Leave your tailgate at home.
A Lance camper requires their own proprietary electrical plug to the truck. If you don't have it installed ahead of time leave some time for the dealer to put it on. Some people cut off the Lance plug and use a standard 7 pin. You will either need a connector in the bed of the truck at the front driver side corner or you'll need a long extension to reach the one at the bumper.
