Hi Jaynee,
Thank you for the compliment! We all love assisting Guest planning their vacations :-).
Good news, I checked the calendar on the WDW website for June 9th and didn't see any scheduled operational closings for the Barnstormer so it should be open during your trip. Keep in mind that even if an attraction isn't scheduled for closure or refurbishments, it could close without notice for a number of reasons. I'd recommend keeping an eye on the website. To see scheduled closings for Magic Kingdom, go to the online calendar for MK by clicking
here.
From there, choose June 2010 from the drop down list beside the
View Month tab. That will give you a list of the hours of operation & Extra Magic Hours for each day. To check for scheduled Operational Updates, click on your dates of travel. To the right of the schedule for a particular day, you will see closings if any are scheduled.
I hope you have a great time on the Barnstormer! Wishing you many magical memories :-) Allison