We were there for a night during a brutal early-June heatwave a few years ago, temperature in the mid-90's, and spent most of the time hunkered down in the shade on a very nice, 5-star campsite on an island in Sark. It was too hot and sunny for such a clear water lake and we only fished it for a few hours. Only decent fish we caught was a remarkably dark lake trout we caught in a bay on the west side early in the morning (not the narrow bay that extends to the northwest). I know there are nice bass and walleyes in there.