Round Lake Muskies

Hi-
I was wondering if anyone out there knew where I can find some Musky action on Round Lake. We go up to a place in Musky Bay every year, and rarely can we find a musky anywhere. Caught a couple in Mud Lake (Filter Bay?) and one off the dock in Musky Bay, though all were caught on Memorial weekends. Any tips for later in the year? First week of August-timeframe?

Thanks,
John