Count me in the hitch group. I had a class III "Hidden Hitch" brand unit installed with a 2" square receiver.
I mount a 3 bike "Sportrack" tubular rack on the hitch. The bike rack's bike mounts can be swiveled on the tube, allowing for different bike frames or even skis. The rack itself can pivot while in the hitch, allowing access to the rear of the vehicle.
To solve the problem of the rack wobbling in the hitch even with the strap, I use a rack tightener. It is a screw-on clamp which fits over the rack at the mount point and then tightens to the side of the hitch. A piece of felt used to protect floors from chair legs is used to protect the hitch surface from the clamp. Now the hitch does not wobble at all, even at high speeds or bumpy roads.
Both the rack and tightener were bought at Crappy Tire. The hitch was installed at the Kia dealership where I bought my car.
Hope this helps!
(Message edited by random006 on June 14, 2005)