Those that store their campers..when you pulling them out!

We normally camp in Wapakoneta OH which is near you. We aim for the 1st week in April based on weather. Last year we had a cold snap and (I know, it was a rough choice) I stayed in the camper 3 weekdays and migrate to work from the CG to ensure it was heated so nothing would freeze.

I look for night time temps to stay near or above freezing. If it dips to 30 degrees just before sun up I'm fine. It will take more than 2 hours for the camper to cool off and start freezing.