I booked HHI for 8/21-8/26 and am waitlisted for 8/19-8/20. I really need the 8/19-8/20 dates and then would cancel 8/25-8/26. What are the chances they'll be a cancellation and I'll get my waitlist request? Can't book airfare until I know for sure, and if I can't get the two earlier dates might cancel the whole trip, as I have two kids that have to get off to college on the 27th and 28th.