Great Northern, Mercer, Wi, is a great place to stay. Definitely tends to get very busy on the weekends and if you like to park the sled and party it might be the best place in the northwoods to do so. Some of the best “off my sled” stories tend to revolve around the great northern bar. Gas and multiple food options close. This would be a better option if you want more stops and places to go. Rooms are dated but clean. There has been some issues with items getting taken from sleds, I have never experienced it. Trails are usually in good shape.
Casino is a good place also. Bar/gas/gambling/food also on site and options close. Rooms are like the great northern, nothing to write home about but good enough. Plenty of parking. Good starting spot if you want to hit more UP trails.
Can’t go wrong with either......but I am more inclined to rent a house instead of a hotel room. More room, more secure, cost can be comparable, full kitchens, etc....