ISO Outdoor/Indoor Venue for Crawfish Boil/BBQ/Family Gathering

Hello. I am fairly new to Houston and I'm looking for a place to host a crawfish boil/bbq/ graduation celebration on May 10th for my son who is graduating from U of H. This event can easily have 100 people or more at any given time. I'm looking for a place where we can use our own crawfish cooker and serve without problems. We will have alcohol (outside) and there will be music. I would like for it to be as affordable as possible (some places are asking for 5K) that's too much for a few hours. Any suggestions would be appreciated! Most parks that have Pavillions have rules against alcohol or you need a permit or you have to hire local police for the entire stay.