Did the ride last year, was fun, but OH SO SLOW. My friends and I were a little late so we were lined up at the back, took us a long time to get clear of the cruisers. Watch for the seams in the bridges, they can cause pich flats. Just take em at an angle and you will be fine. Last year I came across a group of riders that all pinched flatted on one of the seams and I even saw a taco'd wheel.
Have fun, be safe, and bring winter gear! Its cold right there that early.