You've probably already laid out your Opening Day outfit but don't forget that you'll be receiving a free giveaway t-shirt at the entrance. You need to make this shirt part of your outfit. As Tim Gunn would say "Make it work". Otherwise you'll end up carrying it around or swinging it like a rally towel. My plan is to enter the park topless or maybe just wear something tasteful like pasties.
Here's your Opening Day Giveaway T-Shirt