Jennifer, here are several links that you might find helpful from bicycling.com on staying hydrated and fueled during endurance activities:

http://www.bicycling.com/article/1,6...4780-1,00.html
http://www.bicycling.com/article/1,6...4999-1,00.html
http://www.bicycling.com/article/1,6...4997-1,00.html