It important you make a reservation since it free so you dont get settled and the next thing you see someone telling you that you have to leave because the spot has been reserved for another occassion by another group of people.
"Fort Bend County does not charge a fee to visit any of our parks. Most county parks do not require a reservation to visit, however, Kitty Hollow Park does require reservations on weekends (holiday reservations are on a "first-come first-served" basis). Contact us to make your reservation."
You will need to reserve the pavilions
The large pavilions are reserved but the small ones are first come first served. Please be aware of snakes and alligators.
I am not 100% sure but I do think it needs a reservation
Thanks! Your answer is awaiting moderation.