Our Jayco came with a "bike rack" that is frame mounted under the rear of the TT on which I have carried our Champion genny. The frame mounted rack seems to work ok but I would never mount the rack to the bumper. On our previous TT I carried the genny in the rear of the truck bed, bought an extra electric cable, and when we stopped I fired up the genny, hooked up the cable and within minutes we had it cooled enough to make it comfortable for lunch and a nap. Also, the genny vibrates the TT when its mounted on the rear rack.