IF you are a recruited corps squad athlete, the coach will contact you about bringing your equipment. You will likely have a team meeting/picnic the day before where you stow the equipment in the team locker room. Otherwise, you don't need to bring anything that you don't want to carry all day!
If I remember correctly (and it's been a while) in the "what to bring" section it listed sports specific equipment as an approved option -- things like your tennis racquet, if you were going to try out for tennis as a walk-on, or shin guards and cleats for soccer, baseball glove, etc. You can also bring musical instruments. Just remember that anything you bring you will be carrying for at least part of the day on R-Day.