When we had the pop-up, we bought a Yakima roof rack for the bikes. When we got the TT, we had a new dilemma. What to do with the bikes? Everything we've read and researched indicates that bumper racks are not a good thing to do. So for awhile, we just put the bikes inside the trailer until we decided what to do. That worked OK for a few trips, but if we'd had more than two bikes, it wouldn't have worked. So anyway, my husband finally decided to just get some bed rails for the truck and now we have the same Yakima roof rack attached to the bed rails on the truck. Goes right over the tonneau cover. It's been working out very well.