I fished the south end out of Muckwa Lodge in the Cree Indian Reservation. Best fishing I've ever had and I've been to Canada at least once a year for the last 20 years or so. We stopped counting at noon the first day when we were all over 100 walleyes! In one bay we caught 27 northerns on 27 casts!
I know enough people that have gone to Williams Lake and the fishing was no better than many places in Wisconsin or Minnesota.