I think this is a little confusing. Jim is suggesting that the RAID be held as an informal part of RYC's Totally Dinghy, which is scheduled for the weekend of September 21/22. Alan's RAID was scheduled for the weekend of Vallejo 1-2 October 19/20. Two separate events as far as I can tell.
Actually, I suggested that we have the RAID on a weekend that didn't conflict with an already-existing SSS event, but Jim and Ants can do it on the V-1-2 weekend, so here we are.