Missouri City Park Pavillion renting

Ok so i'm stressing trying to have an event that I have a team has been planning for a while and I was looking for venues wondering like for parks in general how crazy they are about breaking the rules or shutting the event down. Like we'll be sure to clean up and everything it's just for parks in general how crazy are they about shutting something down with vendors and music? It wouldn't be to long like 3 or 4 hours after 5pm on a weekend. it's really hard to find a venue that doesn't break the bank and bring in random fees in houston