It would be best to reserve your space because, it's a very popular park and there's always birthday parties, family reunions, etc. If there is no reserved sign, you can use that space.
On weekends, most definitely make reservations
Most of the tables are available to reserve, there are a few that are first come first serve but they are usually full so I suggest you reserve a space.
No reservation for train ride, petting zoo etc. There might a reservation for the picnic area/ table.
If there isn't a sign that it is reserved you can use it.
Not if the tables are open and not reserved.
Yes! With Hayward Area Recreation Department = HARD. All tables are on reserve at the park.
For the "party areas \table areas" : yes Its duoer crowded on. Weekends until it really gets cold
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