a friend of mine had his wedding solemnised a couple of months back. the bride and groom engaged a Pro each. So on the solemnisation, there were 2 pros. Then, between them come friendly competition to capture the 'moment of acceptance' by the groom (the most important requirement by the couple). Unfortunately, both ended up without THE moment.
what can be done? the scene cannot be reenacted. Fortunately, a friend of his offered free service to be a sideline photographer and guess what? he got the moment! He offered the neg over to the PROs to be included in the wedding binder but neither wish to take it up. He ended up offering nieghbourhood lab quality prints, FOC, just to see the couple smile. I think not all 'shoot for free' photogs are 'monkeys'. Without the pressure of undue expectations, competent newcomers may well achieve better results that will help their skills grow.
just my opinion though.