Use my old backpack from high school with an even older leather case for Polaroid cameras in the main pocket as dividers and added protection. There are always two, and usually three still cameras on me; the D3100 and lately my 195 are regular-carrys; then I usually grab one more instant, depending on location
Regular cameras:D3100-18-70mm lens
-8mm fisheye (sometimes)
-remote
-extra battery
Polaroid 195 Land Camera
-Gossen LunaPro SBC meter
-Cable release attached to a DIY adapter that fits over the shutter button
-Pack or two of Fuji FP-100C or FP-3000B instant film
-45-49mm step-up ring
-Tiffen 812 warming filter when shooting color
-Close-up and portrait kits; each of which consists of a hard plastic case, "goggles" that go over the viewfinder, and a corresponding diopter filter (+1 for portrait, +3 for close-up). Am yet to use the close-up kit and I may even stop bringing it.
-Empty film box to stick prints in
Alternate cameras (usually take one of these):Polaroid SX-70 Alpha 1 or
Polaroid SLR-680 SE
-Whatever film
-DIY cable release
-Mint lens set
Minolta Instant Pro
-Whatever film
Ricoh XR6
-Rikenon 50mm
-whatever film
-cable release
Canon FS-20 camcorder
-El cheapo fisheye lens
-DIY cradle holding two video lights
-Gorillapod
Tripod:-old-ass Sony aluminum video tripod that doubles as a weapon
Acc's/misc.-Coast PX20, main light
-El cheapo Amazon light for backup
-spare batteries for both
-rocket blower
-pen duster
-folding knife
-gloves for climbing or moving large objects
-Artprimo Hobo markers
-
ArtWauk flyers-rubber bands
-business cards
-Max Headroom mask
-can of wet cat food
-beer or water if there's room
tl;dr: too much shit