Bring some baby wipes, deodorant and a clean shirt. After you cool down in the air conditioning, wipe down with the baby wipes in the restroom, apply deodorant and change your shirt. You'll end up smelling and feeling better than usual.

27 inch tires are fine. Make sure you pack an extra inner tube (or 2) in your backpack and a frame-mounted hand pump. A lot of complaints about 27 inch tires are just that they are sometimes harder to find. Make sure you've got a source, or shop online for them at nashbar.com or a similar online bike retailer.

Have fun! You'll love it - great way to start the day.