Can't recommend a motel, I would just Google to find one. But I can recommend some roads to ride down there. If you need road information let me know and how long you will have to ride.
Story Inn has a few cottages plus the bedrooms upstairs of the restaurant. If you don't stay there for the night, make sure to stop there on your ride around Brown County. They have a nice restaurant with good food on the main level and a bar/restaurant in the basement. Tables outside too. BTW, the ride to get there is great also! It is a favorite rest stop for a lot of bikers traveling route 135.