I just got back from Moab and I had to pack fairly lightly... All in a Lowepro mini-trekker- Mamiya RB67 w/ attached 90mm, 180mm (I wish I had a 50mm though), 2 backs (1 attached), pentax spotmeter, cable release, red, yellow, green, and pol. filters, and 25 rolls of film. I put the spent film in the outer pocket in a black bag and carried a notebook and tape with me, it all worked out nicely with a little bit of room to spare. -Grant