Might I suggest the Ohio State Parks for a few close in familiarization trips? Yes, most of them have the shower houses shut down for the winter. But, Punderson (for example) has heated shower house all winter. The lodge is nearby, there are lots of things to do in the area. Headlands beach, Fairport Harbor Lighthouse and museum, Holden Arboretum and, of course, there are all those wineries in the Madison area. (Eight to ten within a few miles of each other on one road!
Also, the rates are about 1/3 of what they are at Evergreen Hills. It is a nice place, just pricy.
Best of luck. May the moss never grow on your wheels.