I find the camelbacks heavy, too hot, and they make accessing my jersey pockets difficult. (I tend to put a lot of stuff in there, like a spare pair of gloves (in cool temperature), arm warmers, food, another spare tube if it's not a supported ride or I'm riding alone, etc.)

I usually carry two bottles, one with some drink (lemonade with a pinch of salt) and one with just water (also useful in case of emergency to rinse a wound if you don't have any other clean water handy). I'll arrange to ride where I can find a convenience store or something similar to buy refills if it's a really long ride...

I think drinking from a bottle as one rides is a good skill to learn, but I'm no bottle-integrist. Do what feels best.