I'll be heading up to Wiarton on the 28th right after work, then catching a boat onto
Griffith Island for the long weekend, so I'd be nearby, but unable to meet up.
Grey Road 1 and surrounding area (between Wiarton and Owen Sound) is highly recommended for escarpment carving thrills. Hills, corners, and epic views. Extremely fun and scenic if it's a sunny day.
Anyways, since I make the trip to the Georgian Bay area of Lake Huron quite regularly, here's my 2 cents on getting up there and making it enjoyable:
-DO NOT take Hwy 6. There are OPP everywhere, slow drivers, traffic (especially on long weekends!), and way too many stops. It's an extremely frustrating road to drive on, despite all the passing lane additions they've built over the last 10 years.
-Instead, go north of Waterloo and go to Elmira-Drayton-Palmerston-Harriston, then pick some backroads to catch Grey 3, which runs parallel to Hwy 6.
-Grey 3 has very little traffic, only a couple small towns (Ayton, Keady) to cut through, lots of straight stretches to relax with cruise control set, and a few hills and good corners that you can have some fun with since there's next to no traffic even on long weekends. Follow that road north all the way to an intersection town called Jackson (Hwy 21)
-From there, you can turn right and head into Owen Sound, or left and then a right ~5 km down the road onto Grey 10 north (which becomes Hwy 6 in Hepworth) into Wiarton.
Of course if you were thinking more along the lines of Collingwood/Wasaga, or Kincardine/Goderich/Grand Bend, nevermind. :P