I don't know if this helps any but, TM call it a travel trailer, as does State Farm and the state of Texas.
Carol, I have a 2720 so I tell them it is 27'. Watch out of those KOA jerks, they will give you a slot with just the number of feet you tell them, so from now on for KOA it is a 50' rig.
That way I have a place to park the truck also. ;D