I've done the "lower" carb thing for several months and it has really helped me get rid of some of those extra pounds. I do a number of 60 -100 milers and it's important to eat foods along the way to maintain your energy needs. I'd suggest eating anything that agrees with your stomach/digestion while you are riding. I even eat some carbs the night before and the morning of the event. Some simple snacks for riding that work for me and things that are pretty easy to get your hands on are bananas, peanut butter crackers, fig newtons and gu packs.