Great ideas, all of them, especially the part about how Gibson provides drink vouchers for the events and all the motel stays to and from....I'm sure I saw that mentioned in one of these posts and anyway, the CEO likes surprises, right?
Using on-line video somehow, as others mentioned, to involve the other 99% of us who won't make the trip sounds really key. How about hosting an on-line get-together or two (webinars?) beforehand to sort of test the waters and gauge participation for on-line users. The webinars don't need to be about anything too specific, could just be on-line user meetings. If they go well (good numbers), then that will encourage the effort to have the physical meetings and to enhance them with live video.
Whether you go on-line or on-road, I hope you consider featuring users' (read, forum members) projects, either in-the-can (download-ready) or in-progress. Related idea, CW could sponsor a forum member artist-of-the-month.