Munising has been beat everytime I have been there. Okay to pass through mid-week. But their grooming schedule is messed up and doesn't give the trails a chance.
Grand Marais

Nice place to visit for lunch, I personally don't like to stay there. One way in & out, usually PACKED!
If you are set on driving that far past the bridge, I'd stay in Seney and make a few loops around there. Or go a little farther toward Chatham.
I don't know here you have riddem before, so I don't want to suggest places you have already tried.
I just finished laying out a 5 day saddle bag trip for a guy doing the whole Eastern and Central U.P. , if you have any questions, feel free to PM me, I'd be glad to help with ideas for nice places to stay with 100 mile rides that are easy to navigate and somewhat weekend friendly :div20: