Here is a link to all the information about them. They are great way to find & "test" out new places. I don't think the passes are available daring the summer months (but I could be very wrong on that)
Butting in, they are actually available during the summer as my SIL got one last year. You do have to pay parking when using one of those passes though.
Re: Payne - Zoo question?
https://www.hclib.org/pub/info/MuseumAdventurePassFAQ.cfm
Here is a link to all the information about them. They are great way to find & "test" out new places. I don't think the passes are available daring the summer months (but I could be very wrong on that)
here is a better link
https://www.melsa.org/MuseumAdventurePass/index.cfm