Yeah for my friend who's a wedding photographer, I asked him... Do you want to work or be a guest.
We hired him, he gave us a good rate and some nice freebies in terms of prints as wedding gift.
Plus we get a good deal on photos for other things (engagement, maternity, etc).
The only photographers that I have an issue with for pricing is the sports event photography people who sit in a spot, take thousands of photos and then expect you to find the good ones, roughly crop for yourself and then have to pay 50 bucks for that one photo (digital), and they barely do any touchups.
If I was them and it was a large attendance event, go for the quantity sale and just price them at impulse buy prices.