Busy in Ohioplye depends on the weekend. I have seen weekends where it was almost like a ghost town and others where it has been crammed packed. Certainly July 4 weekend should be one of those packed weekends.
I have been to Ohioplye countless times. The first I have heard about that footpath. Amazing what you can learn here.
The Sisters Cafe in Confluence is very good. If you are leaving from Connelsville, Ohioplye might be a bit early for lunch anyway. The bike shop in town is well worth a visit.