I have a carbon fiber Roubaix and plan to do some credit card touring with it next week. Based on Ten Wheels' recommendation, I'm getting a Topeak MTX seatpost rack and bag, along with the pannier extension sides made for the MTX system, and some Nashbar daypack small panniers. I've already swapped my carbon seatpost for an aluminum and use a 30-yr-old leather saddle, along with 25 mm tires. I won't be camping, just carrying riding clothes and essentials. I think I'll be fine and you would be, too.