What To Wear
No matter what style you are going for in your session, you will always get the best results when you wear what you feel good in. Things to avoid most are busy prints (prints that are not dizzying to the eye are good), logos, and text. Personally, I love seeing color but if a more neutral look is what you want then feel free to do that. Just try to make sure your color choices are different than the setting you are in. This is your session, so make it how you want it to be.
If you have more questions let me know if the contact form on my About page and I would be glad to help customize the look of your session further.