Lowepro Slingshot 102 AW, Mountainsmith Decent small 6L, Tamrac Jazz photo sling, If you are going to be bouncing around on a bike offroad, i would want something more secure than a sling. A regular backpack style pack, they can be had quite small but the price on the sling is quite a bit less. Do some looking and emailing at B&H video/photo, Adorama, even Amazon. B&H, and Adorama will help you find the correct bag for your camera size.