While there are those who argue that the PL contract is one of "adhesion" and is therefore unenforceable, they can't point to any US jurisdiction where such contracts are unenforceable unless also "unconscionable". It is a pretty tough argument to suggest that a resort fee is "unconscionable" so long as the possibility of such a fee is disclosed, it is a fee common to the property, and is within the local norm.

I could see a reasonable challenge if one were assigned to a property which normally charges a $50 resort fee, but imposes a $250 fee for PL reservations.

Unless someone can come up with some good precedential authority under NY contract law, the better advice to OP is to forget it, enjoy his stay and move on beyond making a one time customer service ask at check in or check out.