We had the pins - I went looking for them on this past trip and couldn't find them anywhere so I would suggest getting them on ebay as you see them.
I wore my headband a couple of times and Paul had a Groom Baseball Cap from David's Bridal he would only wear the top hat mickey ears for our rehearsal and dinner.
Wearing the pins only we got free desserts in a couple of restaurants, best tables, lovehearts on the table oh and a couple of glasses of complimentary champagne and wearing the hats we got lots and lots of congratulations from everyone, so fun - but yeah these perks cannot be guaranteed.