can't help you exactly (my sinar 5x7 is much bigger than the deardorff). I used the f64 8x10 pack when I had a Chanham wood 5x7 and liked it a lot well padded and had a rainproof cover which could be deployed. I kept the camera and lenses and accesssories in the main compartment and the film holders in the separate compartment at the top.
Lightware and Tenba are also supposed to have good bags for view cameras, you might check their websites.
Take care,