I hate dedicated camera bags with all their redundant foam padding and inflated pricing. I just use
(and am currently packing) a high-quality wheeled cordura carry-on with accessory straps. The 4x5
and holders each go into appropriate polyethylene boxes, along with lenses, filter, meter, etc. There
is plenty of room for my Gitzo carbon fiber tripod and a changing tent if necessary. The smaller outer
pouch can be quickly zippered off and back on for X-ray, and contains things like eyeglasses, a book
for the flight, rain parka or sweater etc. If I'm going to do any serious hiking I'd prefer a real backpack
sent thru normal luggage, and would simply transfer things into it.