From talk here, it seems as if they plan to keep the cam up and running showing various locations in the park. If this indeed the case I would expect the cam to get just as much traffic and maybe more. Once opening day hits and the park starts operating people are still going to want to see the other sights as well.
Oh, and constant refreshing of a website is not a good thing, especially if lots of people are doing it. That just increases the load on the server even more. It gets so busy trying to handle all the requests that it has a hard time actually sending out the pages. Ever heard of DOS attacks or slashdotting?