Personally I love the Ohio Show but I wouldn't drive 7 hours for it. The venue is more of a small comfortable size, feels a bit locally oriented, rather than nation-wide like Chicago Expo or ReplayFX. Plus the scheduling of the show being Thursday - Saturday (with Saturday as sort of a half day) means you'd likely have to take off work to make it out.
So as much as I love the show and want to help it expand, I'd say in your case you might be disappointed if you planned out a long trip for this, and you would be better off saving your trip for a larger show.