Kathryn, yes, you just need to ring the recreation/tours number. We had a whole list of days lined up, but we got our first choice. The tour runs at 8.30am, 9.00am and 9.30 am each day, so ring up with an idea of which you'd like - again we got our first choice.
They take some details (name, address, phone, etc.) and you pay over the phone. Be sure to mention if you are annual pass holders as there is a good discount. They give you a reservation number which you need on the day of your tour along with photo ID.
Hope you can get it booked.
Thanks, Aruna - I can't wait! And I was hoping for a pin...
ArielJasmine