I would like to have a warmer TC floor... any ideas?

I once had a Lance 8ft sitting on 2X4's to clear the fifth wheel rails.I put foam in between the bed rail and camper and in front,then I put a small electric heater in one of the wheel well openings in the camper,put it on low and it circulated heat all around and under the camper floor keeping everything nice and warm in really cold weather.Kept the holding tanks from freezing and the carpet-less floor,tolerable in bare feet.

Kinda like truck camper skirting, redneck style.