Not that I'm an expert but......
Stay Hydrated -- Drink before you are thirsty -- from what I have read 1 bottle per hour. IMHO, you said that you are carring 2 bottles, if there are adaquately stocked rest stops, and you plan on stopping at them, do you really need the extra weight of the camelback? Also I have seen electrolyte replacement powders in small packages in the sports drink section of W**mart- They are kinda like the powdered Propel or Crystal Light envelopes. Inexpensive, small and quite effective. Other option is measure the appropriate amount of Gatorade, etc powder into a ziplock bag.
Bagel/peanut butter/bananna for breakfast.
Sunscreen??
HAVE FUN!!!