We were stopped by a police officer at 11pm and was told that the park closes at 10pm.

Usually the signs out front will give closing times. I don't remember at Vermilion but it's 10 or 10:30.

I believe that is correct. Most parks close at 10:00 pm.

Most Parks close after 10. That's the standard anywhere. Luckily they just advised you. Real nice they are out there

10:00pm