Are tickets required in advance, and how much do they cost for someone over 60 years old?

You can purchase tickets at the door. There is a senior discount.

I bought a family membership for $80 that will allow a spouse and one child in as many times as you want.

No need to purchase tickets early.

You can purchase tickets at the entrance and if I remember correctly they were $23 or $25 a person for adults. Seniors(60+) are $21