Its been my experience with duallys that the outer will wear quicker than the inner for some reason. All of mine have been that way. You need to rotate to try to keep it even.
We stayed at the Ocala Sun Jan-Mar of 2013. It is a nice park, gated at night. Owners are nice, lots of snowbirds there. You may want to call now for availability, probably full already.
I only have @26k on my 12' Laramie limited, most of it towing. Love the truck! Mileage isn't the best but with 4.10's and towing 17-18k I'll settle with 8-8.5.
