I know that whole park, if you ever want to go for a ride, I’d be glad to show you where everything is.
I have three or four camelbak’s, and I vote for 100 or more oz. Just make sure you getone with enough storage space for the little things you don’t want in your jersey. Other than that, size is the only drawback…some people don’t like bags on thier backs, some don’t mind. I am only 165lbs and I never even notice it there. I have one I don’t even use with new bladders if you would like to save a few bucks, or at least try one out.