Are there bars that serve alcohol?

Yes, there are

There is a place that i saw when i was there it was the eating area were the food trucks are but you have to drink the alcohol there are they won't allow you to leave

There is one place at overlook eatery that serves some beer.

I have never seen it in the park but after dukes pub is a great place to go

Yes, they serve alcohol in the park. You must drink in designated areas.

I know for sure that outside the park you will find them.Not sure about inside wasn't looking hope that helps you.