There are still a number of us out here...best place I've found is the north end of Torch Lake using the public launch...VERY cat friendly beach that you can wade your cat (knee deep water, crystal clear with sand, no rocks) over to and finish raising sails, boom, blocks, etc...then sail away up and down 18 miles of caribbean blue (slightly cold) water with the wind off lake Michigan but without the big water.
They just redid the launch a couple weeks ago...in the pictures it looks to be better than before!http://torchlakeviews.wordpress.com/2009/10/29/attention-boaters-the-boat-ramp-has-returned/
You'll meet a surprising number of people from Grand Rapids while you are up there, too! Plus you have the entire TC area to play / explore / visit...the best in the state!
On a given good weekend during the summer it is not unusual to have 3-4 cats on the water at the same time and half a dozen other monohulls, too. Mild to minimum power boat traffic...the south end has HEAVY powerboat traffic.
A few rocks in a couple coves in the northwest corners of the lake...everything else I've experienced is beautiful sand.
The launch is at the extreme north tip of the lake, about a third of a mile off of M-31 (Eastport, MI)