Definately wear the hats. Was just in
Disneyland in June on my honeymoon before heading off to Hawaii and it is so much fun to have people coming up to you and congratulating you. Also be prepared for people wanting to take your pictures as well. We didn't receive any perks from disney and really weren't expecting any. Although I did have a lot of fun showing cast members my mickey mouse customized wedding ring.
The one thing that was annoying is that disneyland was completely sold out of the bride ears and we were constantly bombarded with questions as to where we had bought ours (by the way the answer was WDW when we got engaged) I wish I would have had some extras with me I could have made a fortune selling them and perhaps paid the wedding off completely LOL
Crista in Idaho