Get creative with RV and other parking...
There are plenty of places to park for the game. From HyVee parking lot, to Walmart etc. I suggest getting creative and take a shuttle or use a car as a shuttle. At many other stadiums, people park all over the city and enjoy tailgating. So put on your thinking cap, look at all the paved lots and go for it. Even small business lots will work if you talk to the owner. And there are tons of them within walking distance of the stadium.