Just curious what you do when you pull your sleds in and they melt all over the place?
The floor in the garage was diamond plate and we did not get the garage with heated floor. You could break up the ice with a few hits with you boot, the diamond plate would give a bit breaking up the ice on the surface, then it was pretty easy to sweep out with a broom.
As for the comment about winter packaging, yes we had heated tanks, heat tape wrapped water lines, R12 insulation, heated floors, and as stated above enclosed underbelly. There are many extra's put into a unit like this for full season camping. When done properly winter camping can be quite enjoyable. We used it in temps down to about 15° below and did have some freeze's on the septic. The tank heaters only keep the tank bottom warm. To properly prepare after that incident, we always used one full gal antifreeze in the septic before setting out, then would add another as it would get fuller.
Regardless of how well the unit is built or prepared, they are not for full winter camping, although we did use it for that purpose. The furnace may last one season if you are lucky, we replaced the furnace by the end of February. Found out we could have rebuilt it with a blower motor, and new jets but they had already tore it out, and had already placed the new furnace in.