Just an FYI..
ABC has been cracking down on these type of events where the promoter offers up alcohol with the purchase of a ticket.
Unless the promoter has the required alcohol license and use permits from the county, the promoter, the skipper and everyone on board can be subject to citation.
I'm sure an organization such as SJYC and Meals on Wheels have applied for and rec'd such permits, but others certainly haven't.
Good luck with the event.