That's what we have done since one time when one of the organisers was left out of pocket when people didn't turn up on the day.
If they pay up front and don't turn up they forfit their money unless someone else steps in!
The tuner wants his full amount wether someone drops out or not!
We've never had anyone moan about paying the full amount up front!
I will probs be along to watch and have a chat with everyone on the day