Best tip I can give is to head to any retail store and buy one of the $15ish dollar folding chairs before you set foot in the park. Then leave in the trunk of your rental car, dump in a trash can or find someone to give it to on your way out of town.
There is little to no bleacher space on any of the fields. Trust me, it'll be the best money you spend while there.
Second best tip is to have your head on a swivel when walking between fields and hug the edges of the walkways. There will be a ton of golf carts shooting all over the place and it's very easy to become roadkill if you're not paying attention.
Final tip is to bring a hat and make sure you bring or buy (when you're getting your chair) some sunscreen. Shade is less available than bleachers at the fields.
You're in for a great time. Was fortunate enough to make three trips with my son and I'll miss it this year. Have been having Jupiter withdrawal it as soon as the calendar hit October. Have a blast.