This is a good question, I had planned to do the same until I found out that ANY MODIFICATION to my LIPPERT FRAME would negate any warranty which included a hitch! I found that out when our fiver's deck started to spring and lucky for us Cedar Creek went to bat for us and forced Lippert to do the repair at their shop (BTW that's on a 10 year old fiver, that's the kind of customer service Cedar Creek gave us!) it turns out that the frame can't handle the weight that far from the rear of the back wheels which in our case was over 12'. I saw another rockwood fiver with a full-dressed Harley on a lift deck but the guy had a third axel installed and extra steel to beef up the frame. The other option is to build/buy a swivel wheel deck which works good according to my research but your in violation of the double towing law as you would with a small trailer but I see other fiver owners hauling small boats and carts on small trailers to and from Florida all the time and never seen one pulled over in fact I seen several pass troopers on I75 without a problem! My solution was to simply buy a cart and leave it in our shed in Florida and make my life easier!
Red Green: "Vegetarian" is an old Indian word meaning "I don't hunt so good."