I'm looking for the smallest bag possible, doesn't need to be top quality, it's only for when I go on the road with the motorcycle on trips, so it's only going to be used a dozen or so times a year. I need it to fit a gripped 40D, 17-85 and the 70-300. possibly a flash but that's not a selling point. I found the tamrac travel pack 71 but don't think I can squeeze both lens's in but I liked it's size. doesn't need to be a back pack, just as small as possible to fit into the saddle bags. thanks

One lens can fit in the water bottle pocket, or you can remove both lenses and fit the whole lot in the main compartment. I can fit the 7D, a 24-70 2.8 and a 70-200 f4 in there easily. The main compartment on my bab has weather sealing material that cinches over while the water bottle pocket is more exposed. I have not, however, tested out the weatherproofing. I like it because it's really easy to access the camera quickly - no zips, just a quick release clip. 
