I agree the Camelback is fine, although I do think you should continue to work on being able to use your water bottle while riding, too. 
As for eating, I think everyone is different so bear that in mind. On CIBA rides, I tend to hit all their SAG stops, so that means that I eat at about 20 mile intervals. That said, I can generally make it to 30-35 miles before eating something, assuming I've had a decent pre-ride meal. I am not, however, a fan of bars and gels. I'll eat them if I have to, but I'd rather have just about anything else. Bananas are probably my preferred pre-ride and on-ride snack. I like Clif blocs, too.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher