Hi, Melinda Although there is alot of room at the park for free for all there is an area on the (Woolner ave) back side of the park that should be reserved if you are planning an event or large gathering need the big BBQ grill & serving area and convenience of the play ground being right within quick reach for littles not to mention having the option of restrooms brought in. You can wing it and not reserve however anyone with reservations can claim the spot you are in. Yiu can just move to the next available if you want. Around the park are plenty of tables with pits and really don't need any reservations at all, most reservations are made for the staging area in the back
You go to the back parking lots by the tennis courts then go the black gates and pay to get in so first come first serve. Also they are closed monday and tuesday but the kroc center has free swim hours 9:00 am to 8:30 pm on weekdays. So if you are trying to swim today go to the kroc center.
You can do both but walk ins are first come first served
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