Kim, I think I use the same sites Pat listed. I was looking for states I have not done and ones kind of driveable. So I start with the site and work with Google then voila! It's driveable for us too.
I still need to check with DH about visiting Niagara Falls and perhaps one of the casinos in the area. The original plan is to use the host hotel and only stay Sat. night. I think other options may make it fun to hang around another day either before or after. We'll have a car, but maybe only the 2-seater. No firm plans on the extra stuff for me yet. I still have to find DH for a couple of minutes to talk with him about it.