Yes I have a camel back - Lobo (?)need a real seat bag for the commute - The water bottle mounts are for various battery locations for the lights - I have since switched to the front of the bike. Some of the seat bags I have seen provide space for hydration systems. I am still working on getting used to frogs up front - intersections on my commute are a bit of a challenge for the clipless pedal - I am getting there though - my avg. speed is definitely increasing. So far so good - looking forward to getting on some long rides and some hill work to see how it feels.