Well, first, the birthday pin simply states Happy Birthday, and they write your name in. It (at least the one I got for myself last fall) doesn't say "it's my birthday" or anything specific like that. In fact, one *could* look at it as me saying happy birthday to everyone looking at it.
And everything I read about it uses the word *celebration*. It's not for the birthday, it's for the *celebration* of one's birthday.
I mean, my friends gave me a baby shower to *celebrate* my baby, 2 months before he arrived!
I got nothing free that day, well, other than the pin.

I got a whole lot of CMs saying Happy Birthday to me, which is always nice, but they didn't give me anything or let me get on to rides early or anything. It was just a nice little extra. Now, it was only days away from my b'day, so for all you purists out there, I'm still probably in your good graces (what a first post, eh?).
We're planning a trip this September. It's a month before my b'day, a month after our 4th wedding anniversary, and just about 6 months after (or before?) my DH's birthday. I think I'll be helping him celebrate his half-birthday that day. And maybe our son's, though he'll have just had a big party in summer, if he starts getting freaked out that no one is giving him a pin (or maybe I'll bring the "Disney citizen" pin that he got last year for him to wear).
Other than the pin, hubby paid for a "princess" bucket, nothing wrong with that, he paid, ya know? The cake was AWFUL and the bucket utterly useless (I was under the impression that there was a Pooh hunnypot bucket, and gave massive hints in THAT direction, but I got a pink princess thing instead), and the comb and brush more for a baby than even for a little girl (let alone a grown woman!), but the magnets are on the fridge (way up high so my princess-admirer Boy doesn't snag 'em) and the pin is cute, and it reminds me of a nice day.
Anyway, if he's being very adamant about NOTHING being done to honor his b'day while in the park, go along with that. But remember that you can, at the last minute, go find town hall or guest relations and grab a button, and you can plunk down $20 and buy a silly bucket, just in case he starts giving you the "I know I SAID no celebration but I can't believe you actually LISTENED to me" sort of thing.
Good luck, have a nice trip!