I just purchased a new 2012 GMC full size pick-up (8 ft. box) and I want to haul 2 Electra Cruisers around the state on our vacation. I would prefer to stand the bikes straight up, and to not take off any of the wheels. What have you guys done in the past? Fabrication is an option, but I really didn't want to drill holes in my new pick-up box. Thanks, Gary