Thanks for the input on the 65 ft limit. I'm thinking that still may
be workable though. The glider trailer is 29 ft and distance from the
nose of my truck to the center of the bed is 15 ft. That would leave
21 ft for RV measured from the center of the fifth wheel aft -- a
smallish RV trailer but not too bad.

The biggest question in my mind is how would this menagerie tow at
highway speed?