We were there on Good Friday this year which was April 7th. Open and in full swing. It was insanely busy too, people parking on the grass!
It was also scorching hot that day. By mid-day, chairs were few and far between. We rented a cabana, and we're so glad we did. We had a woman and her elderly mother ask if they could cool off for a few minutes in out cabana. The mother seemed to be in early stages of heat exhaustion. We let them sit and gave some of our waters too. Quite a day!