i currently shoot with two 40D's, one assembled with a 17-55 2.8 and the other with a 85 1.8 or 70-200 2.8. and the 40D w/17-55 is on a flash bracket most of the day. carrying two cameras (flash bracket in hand, second camera on shoulder) is manageable, but i am wondering what others are doing to manage their equipment. 1 camera shooters - how do you keep your other key lenses near you (ex. belt pouches, shoulder bag, etc)? and how do you keep your sensor from getting dirty from all the lens switching? 2 camera shooters - anyone keep their second camera stuffed in shoulder bag such as the think tank urban design 35, assembled with a lens and ready to go?