I e-mailed Kathy about that. She said it would be a good idea to print out your ticket. Also the waiver is the standard field waiver. You can wait until you arrive or you can print one up and fill it out ahead of time.
Beest, if you are unable to print out your receipt that is fine. If you want to send me a private email or reply on here your real name, I can double check to make sure I have you in the system. You will have to forgive me as I don't know everyones real name yet.
My thought is if you have proof might as well bring it, right.