The basic idea looks good; i.e. to tack the weekend on the end of the conference in the same location. The only problem would be the short notice, but I'll look into this anyway this week and see what can be done.

Update: It seems to me that too many people have already booked their tickets home by now -- though I haven't ruled out the idea of coupling it for next years event. Meanwhile for this year I'll keep researching it as a separate event.