Hi - We have a Coleman Mesa folding camper made by Fleetwood. It has two king size beds, a lounge, a dinette, a stove, ice box, and tons of storage. It has air conditioning, heat and a 6 gal. hot water heater. We love it. We camped at the beach last year and had a blast.
We had a tiny basic Coleman before that...finally bought a new one when the old camper hit 19 years old. And you know what? We loved that one too (obviously - we used it so long).
We think the tent campers are great - they are easy to haul, spacious enough, have amenities, cost is reasonable, and you still get the feeling of camping.
I suggest that you attend an RV show and take a look at all the options out there.
Good Luck, Sandie