I also use an old gray CC400; mine came with the 26" rail and I cut 10" off to make it more portable. It's a dandy camera, all things considered. My kit consists of the camera, Fuji 210mm and 150mm lenses, a Kodak 127mm lens, focusing cloth, loupe, meter, filters & filter holder, gray card, multi-tool, notebook & pen, small flashlight, a Bogen aluminum tripod with the legs covered with foam pipe insulation, a spare shutter release cable, a small roll of electrical tape, a few rubber bands, a couple of spring binder clips, and a dozen film holders. Everything but the camera and tripod fit into an insulated collapsable cooler bag such as you would use for a picnic.
I fabricated several dividers for the cooler bag out of semi-rigid foam covered with scrap nylon fabric. It helps to keep things organized and pulls out for cleaning, and each lens has its own padded compartment.
Left in the trunk of the car are a couple of cases containing more film holders, "just in case" (I have 30 for 4x5.) I use old military ammunition boxes, painted white and with my name and the contents clearly labeled (I got the boxes cheap at a garage sale years ago.) Stuffed into the boxes of "spare" film are a spare ground glass, spare loupe, more spare shutter release cables, etc. The car also contains a roll of duct tape and a scout knife, along with my "emergency kit". Hmm... now that I think about it, I probably ought to change out the MREs in the emergency kit. I think they only last 8-10 years or so! Also in the trunk is an inexpensive 11x14 album containing a selection of work prints representative of the kinds of photographs I make, in case the authorities aren't inclined to take the evidence of the camera, lenses, etc. that I'm a photographer. Since most cops are male, the first three or four photos are of pretty female models. Yes, I know it's sexist. So are most authority figures and with my acerbic wit
I'm better off not getting into a debate with a cop if I can divert him some other way.
I routinely carry this stuff for a few miles, with the camera screwed onto the tripod over one shoulder and the bag over the other. If I think that I'm going to weigh too much for where I'm going, I'll leave out the 127mm lens and three to six of the film holders. I rarely use the 127mm lens anyway and the shutter's sticky; I really have no idea why I'm carrying it except that it's always been there so...
mjs