I really hate to admit this......grey tank overflow

I have a 2010 Spree and when it was new there was a pinched water line that caused it to flood. I vacuumed up the water and the manufacturer warranty covered the pinched line. It has a covered underbelly and I don't know if there is insulation under there or not, but we have not had any moisture problems. I think that you can smell excess moisture in a closed camper if there is a problem. I would think that what you did is fine.
Ray