Lake of the Woods uses 151.8050 [ d156]. I'm not sure if this is used for public safety. They are also licensed for several other frequencies; do a search in the FCC database under Lake of the Woods.
Fawn Lake is licensed for 461.8500 (repeater) under the name N T S INC. I tried going out there once and listening, but didn't hear anything. I suspect the frequency is in use, just not used much.
I don't have anything for Lake Wilderness.
Hope this helps.
Dave