When entering the park, are people required to present ID or DL?

Because it was a military rate I had to present my military ID.

You need id

I didn't. Bought my tickets online. To collect my tickets i just had to have the card i use to purchase the tickets at the kiosk. If that fail then i think u have to present an id.

I had to hand over my passport to collect my tickets

I think it depends on your ticket. They wouldn't have to confirm your identity with a regular ticket, just annual passes.

First time you visit a park you will, then anytime the fingerprint scanner fails (which happens often) you will have to show ID.

No. Only 1st visit, then u scan in and have ur fingerprint read after that

I think it depends. You do if you buy in state tickets to prove that you are a resident.

We didn't and we were there yesterday

Yes