It's very true not to expect anything special, but if they don't even know about it, they can't do anything for you if possible. Tell them when you make your res's, your PS's, at resort check-in, or when you check-in for a PS. I did this for our 30th anniv. last summer at the GF and all of our PS's. We were pleasently surprised several times. At check-in we were upgraded to a room with a lagoon/MKview. We could watch the fireworks from our room. On our last night there, we ate dinner at CRT and ended up with the center window table. Awsome!! Upon returning to the GF, they had roses and champain in our room waiting for us.
Our son and his new bride just returned from their honeymoon at the GF. When he made the res's, I told him to have them include on it that it was their honeymoon. When they checked in, they were upgraded to the Honeymoon Suite. At Norway, they sang a special Norweign(sp?) love song to them during dinner and gave them a special dessert.
All of this said, ASK and you might be surprised as to what is done for you. It dosen't hurt to let them(WDW) know this is a special trip to you.