First trip south for winter.

We just got home from our 1st winter of snow birding. Panhandle was cold and windy didn't get warm till we got to tampa. Found campgrounds in Venice and fort Myers not to our liking. Tight and unfriendly. Loved Georgia and south Carolina.

You didn't mention where in Ohio you are or the route you intend to take. Be aware the I75 was shut down completely around the KY/TN border or in that area for rock slide. There may be an update to this on the internet but last report was it would be totally open around 04/15/16.
As far as over night stopping, we stay at the Flying J truck stops. They have an area usually in the front of the facility for RV parking. A lot of people don't care for that but then again a lot do. If you need a campground you would have to do a search along the route you intend to take and start making calls to be sure they are open. I would assume quite a few would be opening soon as the weather warms and you should experience warmer weather if not already in your area at least warming in KY. It's plenty warm here in Central FL. Temps of late have been low to mid 80's.
Hope this helps a bit and have a GREAT SAFE trip.

If you want warm weather every day you need to go to the Keys.
Plain and simple, no matter what anyone else tells you.

Even then there will be some days that you'll need a coat

Jack L

If you want warm all winter, say from Nov to late March, go south of Sarasota/Brandenton. We spend the winter in the Ocala area and some days are quite chilly, nights in the 30s and 40s.