Tailgating is kind of limited (where alcohol is allowed). I have seen visitors from other schools tailgating in the UW Baseball field parking lots...so that is an option (the lots are about a block away from the stadium, east and a bit north). I have also seen visitors go to UW tailgate park (south of the stadium)...but there you have to purchase everything you want (no outside food / drink allowed). They do sell beer, have brats, etc.