Does this park have any pavilions?

There are pavilions but they require reservations. They are located near the train.

And are identified by a letter A-G i believe.

There are several pavilions and you want to reserve them if your planing an event. Depending on when you want to use one, they may just be available. Ive gone there many times on weekdays and all of them were free.

There are pavilions and it is reserved in advance for birthday parties and they are nex to the train.

There is no pavilion in the kids park side. However there is plenty of park benches for seating.