The funds will remain in the hands of a third party until you make a tangible commitment to make the trip.
Trust me, It will be a gas.
Every one of these get togethers which I have been to, on the last day when everyone is packed up and ready to leave, I find myself just standing there, not really wanting to leave yet. I am not normally like that, but the crowd that shows up to this event are my kind of people so I don't feel like running away screaming like I tend to normally want to do.