In Scotts' defense, there are alot of threads already on this subject and he is correct, a search for hitch will get you everything discussed on these forums and more. As I remember it, Heartland is not interested in providing a hitch as it would open up liability issues for them. I understand their stand but still have had our dealer add a hitch to our Bighorn for our bike rack. Works very well by the way.
Try this link //heartlandowners.org/showthread.php?t=315&highlight=hitch
here's another //heartlandowners.org/showthread.php?t=922&highlight=hitch
andanother //heartlandowners.org/showthread.php?t=805&highlight=hitch