Several years ago I bought a generic bag on sale at B&H that has 2 separate main compartments and lots of side and front pockets. It was inexpensive and I was inexperienced and didn't know what I really needed. It is difficult to use for many reasons including remembering which compartment contains what, constantly zipping and unzipping, can't easily open the bottom bag with the bag laying flat, etc. I intended it for a medium format camera and it is fairly tight getting everything for a 4x5 in it. I am considering buying another one for this trip and would appreciate suggestions? I intend to carry the camera, film and lens in it on the plane.