With the caveat that I have made three out of four of the ACUCs (even planning to go -- but not due to severe depression) and not having made Tahoe, I don't think anyone can convince David that Tahoe would be the same as the actual national user's conference. Yes, it is a conference based on what a conference is, but it is not the ACUC (for good or for bad).
That would be like saying that going to a football game in your region should count as the Super Bowl, simply because it is a football game, albeit an incredibly good football game.
