Anyone know how late you can arrive at campground three?

I was told that you risk forfeiting your spot if you so not arrive on the first day or a multi-day reservation. Otherwise the groundskeeper typically runs by all the sites in the morning

You can arrive any time. But if you reserved your day starts a like 5 or 6am if I'm not mistaken. The campgrounds keeper is very reasonable and unless someone else reserved right behind you you could probably stretch your stay a little.

I arrived at 7pm and it a fine. Another site arrived at 9pm.