The Kelty 32L front opening pack is high on my list of possibleI gave up on camera specific bags long ago. I use a Kelty Redwing 2650 pack if I have to carry much gear. Has room for gear, cloths, food and has room for a 3 liter blade. I put my lenses in padded cases and just stuff them in the pack. Opens from the top and bottom and has two large pockets on the side for really quick access.