Hi ArkieBug - we also have a 3650RK, I am working on a attachable trailer to haul our EZ GO Gulf cart. MOC Member bsmeaton (Brad) has a large boat behind his montana you need to look at his profile he has a picture. There is a web site
www.wecamp2.com/size and it will give you the requirements per state. No I am not the expert, but have been told the minute you put a hitch on the rear of your MONTY, you void the warranty on the FRAME. More MOC members will be along with more information. hope some of what I laid out will help you. safe travels John