Check with the ticket office mid July. If no luck, check online sights like stub or vivid. Stay in IC or up the road 20 minutes in Cedar Rapids. Last I knew, Hawks stayed at the Double Tree downtown CR or Kirkwood Hotel, both very nice, new or recently renovated.
Clones stay at the Marriott in Coralville but avoid the area due to all the trailers and livestock wandering around causing a very odoriferous evening on Friday night! There is a good craft beer house next to the Marriott as well as some restaurants if you so choose to hit that area, you’ve been warned about the aforementioned livestock and mouth breathers. JK!
You have options for parking in IC but get there early due to all the fans from both sides showing up to tailgate/party. Those that have tickets go to the game or give them up and watch all around the stadium while being social throughout. You can park at the U of I library lot or down the street at the maintenance lot across from the student rec center, all about a 15 minutes walk up the hill to the stadium. Get into the stadium 30 minutes before kick to experience the Hawk entrance to the field. Fun stuff.
You should park and take a twelve with you and start walking toward the stadium and once on Melrose Avenue there are plenty of house parties that you can find people your own age that will be more than happy to invite you into their area to drink, eat, and have fun or plenty of tailgates in the parking lots too. It’s the Hawkeye way! Or hit the bars on the ped mall - Airliner is one of the best as well as many others. There are plenty of restaurants to choose from West of Kinnick on Coralville strip (route 1) - Wig n Pen, Vine, etc. New craft beer houses going up around town and old ones that have been there too. Stella by the stadium has good food and booze, it will be packed early though like all places.
Tailgating gets started early, 5 to 6 am and only builds bigger and better until game time. This game is kinda like USC/Clemson so that should tell you everything you need to know. Enjoy the weekend in IC/CR area and Go Hawks!!