My primary purpose of going to this National Reserve was to check out some birds so I got there by 7:30am on a Saturday (which is early enough to not have to pay to enter). The place is huge, and I spent about half my time on the beach trying to figure out the different types of sandpipers; and even a quick, illegal, dip in the water because it was so peaceful and I was literally the only person on the beach I just couldn't resist. The second half of my time was walking through the trails with my binoculars and just watching the birds.
My only complaint is that the park staff close off the half of the park that has the most birds so people don't disturb them, which wasn't very conducive to me. Also, like any park on a Saturday, as the day went on it became more and more crowded so I called it quits around 12:30pm.
All in all, it's a beautiful place and I highly recommend going to all the nature lovers.