Here is what I may carry in my photo bag or case when I need to travel with a light photographic load.

Lens pen
Large Ziploc Bag
Polarizing & Graduated Neutral Density Filter

Option A (point & shoot digital)
Hewlett Packard Photosmart M425
Extra AA batteries for camera
Pocket Tripod

Option B (digital)
Canon G5 digital camera in belt case
CompactFlash Memory Cards (5)
CompactFlash Memory Card Reader (for use on a computer found on site)
Extra BP-511 or 512 battery for camera (with AC & DC optional battery charger)
Pocket Tripod or Monopod (optional)

Option C (35mm Rangefinder/Compact/Point & Shoot)
ISO 200 and/or ISO 400 film (at least one 36 exp. roll per day)
Minolta Hi-Matic 9 or Canon QL17 or Nikon L35
Pocket Tripod or Monopod (optional)
Extra batteries for camera

Option D (SLR + 1 lens)
ISO 200 and/or ISO 400 film (at least one 36 exp roll/day)
Nikon N70 or F2 or F4 or Fuji S5
35-70mm f/2.8 or 28-200 or 55mm macro or 35mm f/1.4 or 50mm f/1.4
Small flash unit with long sync cord (optional)
Tabletop Tripod or Monopod (optional)
Hand-held Light Meter for F2
Extra batteries for camera

Option E (SLR + 2 lenses)
Nikon N70 or F2 or F4 or Fuji S5
35-70mm f/2.8 plus 75-150mm f/3.5
28-200mm zoom plus 35mm f/1.4 or 55mm macro or 400mm
Hand-held Light Meter for F2
ISO 200 and/or ISO 400 film
(at least one 36 exp. roll per day)
Tabletop Tripod or Monopod (optional)
Small flash unit with long sync cord (optional)
Extra batteries for camera

Option F (medium format film)
6x7cm or 6x9cm rangefinder camera
Enough film to shoot at least 24 photos per day
ISO 200 film (50% of film carried)
ISO 100 or lower film (25% of film carried)
ISO 400 or higher film (25% of film carried)
Hand-held Light Meter
Monopod or Tabletop Tripod
Cable Release