2 miles East of Belle Vista?
Heck, you were right next us!
Our place is about 1/2 way between oak point and Sleeper State Park. Describe your Uncle's shack. If I can't place, I'm sure the old man will.
As for your OB friend, never seen him before. I've only ran down to Bay City three times from the lake. I typically run to Port Austin or Tawas City from Caseville. Went to Oscoda once, realized there was nothing to do, then headed back to Tawas. Charity Island is fun, but its always been a crap shoot getting in there without smacking at least one rock with a prop (especially with the low water). I remember seeing one guy with an late 80'ish Baja (I think) with twin motors running around both Bay City, Caseville and Tawas. The name of the boat had something to do with "cop" or "police".