hi rockrat, I got a bike rack from City Bike Shop in Traverse City which has curved thingies for holding each wheel from the bottom (the bike sits on it) and then an arm swings into place and I slide a widget down on the front bike fender, holding the bike upright. It is very stable & can be locked, both bike on rack & rack on (in) hitch. I had a front hitch mounted on the CH and drove at highway speeds with no problems keeping the bikes steady. Just a few bugs & things. The rack worked really well on rear hitch, too. I initially got a spiffy bag to go over the bikes, a hassle and couldn't see the headlights nor tail lights, so returned it to bike shop. I plan on using the rack on the Phoenix (whenever that may be finished) & also now have a rack for my Piaggio scooter. I tried a number of rack styles over the years & the one I have now seems to be the sturdiest style.
kevin
northwest lower Michigan