In downtown Chattanooga, the Hilton Garden Inn and Courtyard Marriot are good options. If you are looking for a cheaper option closer to the venue, the Hampton Inn Chattanooga West/Lookout Mountain or Fairfield Inn & Suites Chattanooga I-24/Lookout Mountain would be good options.
Truly there are many great options throughout the city, feel free to look around! AirBnb or VRBO will also have great options if you and a group are looking to stay together!