The waist-mounted CamelBak pretty much sucks for running, too- it's hot and centered too high- so most people are either using a single or double bottle pack, or a backpack CamelBak. If you like the wind on your back, you aren't going to like any CamelBak-type thing.

If I were you, I'd put two bottle cages on the bike frame, and if that isn't enough, then a seat-post mounted double bottle holder- but be aware that the nickname for these is "Bottle Launcher-" so the seat-post holder isn't the most secure thing...

If you have aerobars, there's a bottle holder that goes between the bars, with a bottle that fits in there.

Nanci