I honestly cannot answer that question you would probably have to call them and ask every time I have went there I was fortunate enough to go with a school or a group. I'm sorry I was unable to help good luck in finding your answer. It definitely is a must see place, and plan a whole day it is wonderful there's so much to explore!
Check out their website for days that are free
It was earlier this week, I believe the next time will be in September
Yes their website, just have ID!!!!? Parking is 22.00 keep in mind n budget n check payment forms!
I believe if you go to their website it will say the dates for free days
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