I was just there for the Canada Day long weekend. I wasn't able to find any charts of the lake. The lake is reasonably deep in the middle, but if you have a boat, be very careful near shore as there are lots of big rocks. I launched my boat at one of the many water access points between the cottages and as I was coming back to pull the boat out of the water, I dinged my prop on a rock. Needless to say I wish I had searched out a proper boat launch.
Fishing for the few days we were there wasn't the greatest - it was pretty chilly and windy, but we did manage to land four 2-3 lb smallmouth (all on worms, C&R), hooked but failed to land a 3+ smallmouth, and had a good sized pike snap my wife's line. I'm told that the lake also has walleye but we did not find any of those.
Good luck and have fun.