What Are Your Day Trip Essentials?

Ashley
Hi ladies :) I've got a busy day ahead of me tomorrow. My boyfriend and I are going out of state for a concert. We're leaving at 7 in the morning, and driving about three hours to a popular tourist area. We'll be spending the rest of the morning and afternoon shopping. We're then going to the concert, which we don't expect to finish until around 11 that night. And then, it's another long drive back home. 
​Right now, I'm putting together everything I think I'll need to get me through the entire day tomorrow. So, I'm wondering... What are your summer day trip essentials?