Scott Malsom,
I just replied to a Private Message inquiry almost just like yours. This is my reply to him:
For my previous 2012 R27, I had the Float-On all aluminum trailer used to tow the R27 behind my 2011 Silverado 2500 3/4 ton 4x4 diesel. Absolutely no problems with this arrangement - flat, hills, mountains or launching/retrieving on steep and slippery ramps. The weights involved were:
1. Trailer weight = 1,274 pounds
2. R27 weight = 9,276 pounds (1/2 fuel, empty waste tank, empty water tank, our stuff, RIB dinghy, A/C, GenSet.
Watch out for this number if you have a full fuel tank, non-empty waste tank and/or water tank and lots of your stuff aboard when trailering.
3. GVWR of the trailer = 11,274 pounds
4. Trailer + R27 = 10,550 pounds
5. GVWR - (Trailer + R27) = 724 pounds to spare (trailer safety margin)
6. Silverado 2500 4x4 diesel ball hitch rating = 13,000 pounds (VERIFY this hitch rating. Some dealers are not totally aware or completely frank about this number)
7. Trailer + R27 = 10,550 pounds
7. Hitch rating - (Trailer + R27) = 2,450 pounds (hitch safety margin)
Keep these numbers in mind so that you don't exceed the GVWR of your trailer or the hitch rating of your truck. Then, determine if your gas powered GMC 2500 will handle the load in the conditions where you will trailer - flat, hills, mountains, steep slippery ramps.
I can tell you that the consensus opinion on this forum to trailer an R27 is to use a 3/4 ton diesel truck, preferably a 4x4.