If there is one of the popular teams you want to see you need to be in the stands two or three games ahead. If you have a group of folks always leave someone behind or someone will try and grab some of your seats. Bring seats cushions, you'll need them.
Don't buy the food packages as they always run out if food and drink so not worth it.
You have to take a trolley to the fields from the parking area. Allow 35-45 minutes for that. Trolley goes to fields 1-4 first and then fields 8-9.
Bring multiple layers of clothing as it can go from cold and rain to hot in a few hours.
We found the food/drink package to be worth it for the drinks alone - we were able to get drinks on demand at both fields and the cost of the wrist band more than paid for itself in drinks, especially for the kids. There's not a lot of shade, I would recommend bringing sunscreen. The shuttles were great, we only had to wait once. We went on Friday last year, planning the same this year.