Depending on how easy it is to access the lines, tapping into the propane system can be pretty straight forward. One consideration is if you do it downstream of the coach's propane regulator, you will have to remove the regulator on the cooker and install some other kind of control valve. If you run coach regulated propane through the cookers regulator as well, there won't be enough pressure for the cooker to function properly.
Lines and disconnects are easy to find, I have a 12 ft line and quick disconnect where my home grill connects to the house natural gas system.
