You can easily add a bolt-on receiver if your unit has the square bumper. The newer TM's have a plastic storage compartment and that bumper cannot support a bolt-on receiver. However, those models can accommodate a rear hitch bolted or welded to the TM frame.
We have had considerable experience carrying bikes on the back of our unit. Check this link, it will list our experiences and good information from other owners.
http://www.trailmanorowners.com/foru...ight=bike+rack
Send me a PM if you need more information.
Dick