Haven't been to a game in a few years, but coming from a J-Town grad, my advice is to show up early. The Johnston Community cares about its basketball team and isn't afraid to show it. When I was in school the gym would easily be filled before the girls game (or sophomore game depending on the opponent). The gym is decent size, but gets crowded real fast. I myself want to go see HB play, and know that a few of my fellow graduates are going as well. So my advice is to show up early, they aren't afraid to turn people away (which is what usually happens when they play Urbandale).