You will only be able to solve the puzzle and find the cache location once you are at the given coordinates.
Parking: During Steelers training camp (late July/August), please park at the fan parking. You'll have a good walk to the cache, but it's located away from all of the action, so muggles may not be as much of an issue as you'd think. During other times, please stop by the booth at the entrance gate. Tell the attendant that you are here to visit and walk around the campus, and they will give you instructions on where to park (it may vary depending on the date and time). Or you can park in a nearby lot (such as the Winnie Palmer Nature Reserve) and walk on to campus from there.