How many boats should we set as the "minimum?"

In other words, if there are less than say 6 who are definite, should we have the first nationals at a more accessible venue and have it as a 2 or 3 day (vs. 5 day) event? I mean, I'd love to take advantage of this opportunity (thanks again, WF), but what would generate the highest attendance?

Just brainstorming.

Michael C.