jelag, I've seen flatbed bodies like you mentioned with a bike in front of the 5th wheel trlr. Let's see if I can explain this right! They had an extendable arm with a built in winch that they extended out past the bed of the truck, connected/strapped the bike to it, then lifted it up and onto the truck bed. The bike was then crossways on the bed right behind the cab. If you can get your hitch back far enough so that the trlr won't hit the bike when turning, this might work real well. This way, the bike could be put on or off without unhooking the trailer. I'm sure, with your ingenuity, you could build something like this. And it makes putting the bike on the truck much easier and less scary than riding up a steep ramp!