Originally Posted by CliffordK

I have a few different hitches. None with a wheel mount.

Two of my bike trailers simply clamp onto the chainstay.
The Burley trailer has a big hitch that snags both the chainstay and the seatstay, although I did notice I was kicking it a bit yesterday
Bike Friday welds a piece of pipe onto the frame which they attach the male end of an airhose coupling to. The female end gets connected to the trailer with a short section of hose. Quite simple, and very functional.

I can post photos of the above 3 types of hitches if you wish.