If you're comfy with the Camelbak, use it. The time it takes to sling it on your back in T1 and off in T2 is negligible, compared with the aggravation of trying to drink out of a bottle, if you're not good at that. I am fine with the bottle, but that's one of my skills, like parallel parking! I find it harder to drink out of the Camelbak, and only use it on long rides where I need to carry more water.

The run on a sprint is so short that I might not keep it on for the run, just grab a cup of water at the water station.

Good luck!