If the F16 and/or F18 class are interested in a combined event, then it is best for the committee members to contcact each other to organise. Talking about it on a forum will not do it.

As for promoting cat sailing, it would be far more effective to organise an open event for Multis, Monos, Boards (and yachts depending on location). I have been to quiet a few events like this and they tend to stand out as some of the most enjoyable regattas. You will see more kids............. and ladies at these style events. All potential Multihull sailors.