ideasfor a getaway between OH&MI...s.w.ON/CA?

looking for a midway point getaway between cleveland OH and kalamazoo MI for a weekend. one coming from MI and one coming from OH, both will be driving up to 5hrs, so looking at areas surrounding the west tip of Lake Erie. I know nothing about the area, so looking for clever ideas! Detroit doesnt really sound appealing...it's kind of a first date / vacation, so basically - i want to suggest something not everyone knows about, where we can feel alone but not stuck. ;) We are both artists, so looking for recharge/inspiration/photo opps.
we both enjoy camping well enough, but not too rugged - not too remote to set up a tent reasonably close to the car. it should be not too expensive, but not too commercial. so if you have any great hotel finds, or museum/cultural areas, even a cabin in a park is ok too, anything with hopefully lots of nature to watch and some water maybe.

what about Lake St. Clair? is that too close to Detroit for a nature trip? Point Pelee Nat'l Park?