I too am looking for a way to transport about 3 bikes. I already have the rack that gets hooked to my receiver on my tow vehicle, but I kinda need that spot for the TT.
Looking on the net and looking at the bumper, there's no way that I would feel comfortable with a bolt on for my rack. So i'm wondering if anyone has welded a 2" receiver to the center beam of their TT? Has anyone does this with theirs?