@joanaw
No worries!
I was successful (came as such a shock!) and I am leaving for Dubai on the 29th August
Yes, it is best to plan for 3 days. Perhaps book one nights accomodation...and then reassess when the time comes! This is what I did, although my open day lasted 2 days rather than three due to the number of applicants. Applicants shortlisted are called back for further interviews the following day, then a final interview on the third day.
Best of luck! If the Open day is first, I would go to that