Just saying, SIGN UP EARLY!
No to add-on temp holes. They all SUCK typically, and its a pain in the arse to do the extra work on the TD.
Dick did his job, he advertised, he informed that it would fill up, and he has indicated it almost daily online here, I am not sure that there is much anything else that you can do from a TD standpoint, except, say, "Sorry, folks, the park's closed. The moose out front should've told you!"