There are quit a few Hotels with in reasonable driving distance that you can stay at.
There are 3 different motels within a mile from racetrack
Depending on how much yoy are willing to spend. We stay about 15 minutes away and the motels are a lot cheaper thank right next to the track. Next to the track is very expensive but may be available
CandleWood Suites, comfort Inn, Best Western, Great Wolf Lodge, Holiday Inn ect
There are hotels in the area, personally I would stay in the Bonner Springs area about 5 minutes away.
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