I have never gone before but I would imagime if your o.k. with not looking at the planes on display etc, and just want to see them in the air doing their tricks, you could park anywhere in the vicinity and watch for free.
My dad use to live out that way years ago and they would say they could see the planes from their yard.
so do a google search and see what is located close by and check it out. It probably won’t be as good but you should be able to catch the in air tricks, I would think ,as they can’t be flying so low to keep it contained behind a fence!
Let us know if you find a good spot!