Yes you have to pay if you want to use the pavilions, but there is plenty of table and grills to use for free, first in first serve....
On weekends and Holidays, you also have to pay to enter the Park. Weekday entry is free.
Only if you want to reserve a place
Not sure if you have to pay but you do have to make reservations to use the pavilions there. Also on weekends there is a small fee to enter the park.
I think you do. They have pavilions to rent. For small family group you probably be ok without prearrangement.
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