TKConn... unfortunately going with an HTT will not solve the problem you encountered with the rain. As a matter of fact, on our last trip, the winds were really bad while camping by the beach and my wife got no sleep because of the tent ends inflatin...
Not sure what time of the year you are coming, but if you like the beach, I would recommend Gamble Rogers Memoria State Park. There are only 30 sites and they book quick, but you are basically on the water with red sand! Do try Ft Clinch.
I have been towing our 19' HTT (2,700 lbs dry weight "whatever that means") for 2 years now with a 2005 Odyssey EX-L.Yup, I installed the hitch, 7 pin wiring harness, transmission cooler, steering cooler, weight distribution hitch, fresh transmission...
Not sure if you are referring to an "extendable" as one of those TTs that have the rear bed that slides out in a hard shell, but if you are, I can tell you that there is a family that camps with us and they have one of those with bunk beds on the fro...
We mostly cook outside. That poor stove that attaches to the outside of the camper gets used on every trip. I do make coffee inside in the morning, though and sometimes have to use both outside and inside to get breakfast ready.