If CKLW is staying on Day Pattern, they are sending much of their power Southwest, rather than North, The Night lobe to the North is considerably larger than the Day lobe. That's part of the reduction of the signal if this is true. Also, there are now quite a few stations in the US on 800 at Night that cause more interference. With WMVP reducing power, and changing patterns, they will be lucky if their signal in Northern Michigan and Wisconsin is equal to what it is now.
In retrospect, the FM Top 40s in Northern MIchigan were pretty good, but few had many FM radios to take advantage of it.
Speaking of Fremont, WSHN-FM 100.1 moved out to Holton on the premise that they still had WSHN 1550 as their First Local Service. Then that was deleted. Fremont is probably one of the more substantial communities in the state without a local radio service. And WSHN 1550 had a pretty limited signal also. Years before WBFC 1490 moved from Fremont to Whitehall.