Hi,
you should take with you any test results that you have already done, plus the MRI report (and CD if you have it), just in case. If you haven't had a hearing test, they will probably order one for you. Ask also if you need a VMG (balance) test.
Given that your AN is still small, you will likely be placed in W&W. They should schedule another MRI within 6 months, to establish if it is growing.
Ask Dr. W. if he would also give you a referral to see the neurosurgeon he works with, Dr. Akagami. Even if you don't need to see him right away he has very long waiting lists, so it is good to be in the system.
Ask about all treatment options that are available to you (you have all three with your size, W&W, stereotactic radiation and surgery (3 types of surgery)). Ask for the pros and cons of each, what Dr. W. recommends given the size and location of your tumor and why. Make sure to mention your symptoms and if they are bothersome or not.
There is a list of questions available somewhere on the forum, as well as on the ANA website, it is good to print it out. Make sure to take notes (if you can have someone with you it would be great too) - it is so easy to get lost in the middle of too much information.
Good luck with your visit - let us know how it went.
Marianna