Great visual design here, great concept. I'll echo what you've been hearing about the ticket numbers, but I expect most Wardens will just adjust up or down depending on how sinister they want the park to be. Some more ways to earn tickets might be fun too, especially if they're a little dodgy. I do also find myself wishing for a little more horror here. It'd be fun to let PCs rest here a few times before they uncover some big horrors. You mention that Nutri-Paste is an ingredient in making the Stanley's, but it might be better the other way around.
Yet another module I wish had five more pages! All in all, a very fun tool to use for those recovery sessions.