There is no cell service onsite!
Download the map area for the surrounding 30 miles of the venue on Google Maps ahead of time and your GPS will work the whole way there, you may also want to save the coordinates listed below into your saved places on Google Maps for easy access. This is how you download a map area:
https://support.google.com/maps/answer/6291838?hl=en&co=GENIE.Platform%3DAndroid