I think the best way to transport a bike on the TD is to use a slide in reciever. I have one on our trailer and we have hauled our trikes from Arizona to Idaho and back with no problems.
Here's a shot of our set up that took us up to Idaho. I have since changed out racks. We now use a DraftMaster and have been very happy with it. The DraftMaster and the ATOC require a slide in reciever. Having a reciever welded on should be something most trailers should be able to have done. I can't imagine going somewhere without my trike or bike.
Mikey