When you look for a spot for a party, are they usually available table spots or are most of them reserved?? Should I arrive early to get a spot or do you recommend to reserve??

Reservations recommended for weekends, specially holidays. Weekdays reservations are not necessary.

Definitely reserve if you can. Seating spans across a lot of the park and they have different sections with play areas for kids, and other areas that dont. Give yourself the upper hand by reserving especially around holidays. Note: it starts to see a lot of people after 8 or 9.