Just a thought, presumably whoever supported this years event would have an automatic invite to next year?, if they then decline the offer then someone else would get their place. This would save all that faffing around waiting to find out if you were in or not so you could make plans in advance. Entrants from 2010 receive an email offering them the same class(es) that they were in before, they then have to reply AND pay before a given date (no exceptions).
Seems the fairest way to me to reward the people that supported from the start