You're only out a few thousand. Tourism Saskatchewan estimates the number of lakes to be around 100,000. The number of lakes with fish are about 94,000. The number of lakes with fish in Alberta is about 800.
Yup you're right Makes it tough to guess a lake by a background
But most of the saskatchewan lakes seem inaccessible. The roads a terrible as well. I'll have to do some exploring in North saskatchewan. There must be some good perch lakes up there.