To get to Summerfest you will need the code for the gate.
I am not going to tell you what it is. It's a secret, and it wouldn't be secret any more if I did
Your LO will tell you it shortly. If you don't know it by tomorrow night, feel free to start bugging them.
Please DO NOT put it up anywhere public on the internet once you know it. I refer you to the thing about it being a secret.
If you arrive at the site and don't know it, or have forgotten it, you will need to either contact your LO somehow or wait for someone who knows it to come along.