Can you see it at night

If you have a special reason and take it to the park staff they are usually more than happy to help you otherwise no

Nope

The park locks the gate at 21:00.

You can see it at night if you know where to look, the light is not very bright. It's for show, not navigation.

Sorry no unless your camping at the parks campground.

Only until 9pm i believe tgen the park closes