How can I reduce the severe sunburn I am probably going to get tomorrow?

Tomorrow I am going to warped tour. I live in Vegas so the heat is going to be excruciating and horrible. Is there anyway I can reduce my chances of getting terribly sunburned ? I seriously don't want to get a tan. And I KNOW to put sunscreen and keep applying. I don't want stupid answers telling me to put sunscreen haha. That's pretty obvious. Soo any tips or advice ?:D