During our travel shoot in Rome, Venice, Paris, Switzerland and London we have to make sure that the appropriate equipment is on hand. On this trip we decided to move our equipment around in the ThinkTank Streetwalker Harddrive Backpack. We have a ThinkTank rolling bag but didn't think it was appropriate for rolling on the cobble stone roads and sidewalks. Being a Nikon shooter of course we packed a couple of Nikon Cameras, lens and accessories...
Nikon D4S w/easyCover Silicone Protection Cover
Nikon P7100 Pro Compact Camera (backup camera carried in suite case)
Nikon 14-24mm f/2.8
Nikon 24-105mm f/4
Nikon 50mm f/1.8
Nikon 70-200mm f.2.8
Nikon 24mm f/3.5 PC (Perspective Control) lense for architectural photography
Sony Vaio 13.3" laptop w/Adobe Photoshop and Lightroom (fits in laptop slot at side of pack)
Apple iPad Air
Vanguard Carbon Fiber Tripod
Gepe Card Safe Extreme Watertight Memory Card Case
Lexar Professional CF Memory Cards
Sony XQD Memory Cards (Nikon Exclusive)
Vivitar 280 HV speedlight
2-Pocket Wizard Plus III's
Sekonic LiteMaster Pro L-478DR Light Meter
X-Rite ColorChecker Passport
Epson P-7000 Multimedia Storage Viewer for digital file backup
di-GPS for Nikon DSLR
SMDV Wireless shutter release for Nikon
CamRanger Wireless Camera Control
Variable ND filter, Circular Polarizer & Close-up filters
Rogue Gels Universal Lighting Filter Kit for speedlight
Arkon Hot Shoe Phone Mount & Andoer Dual Hot Shoe Speedlite Bracket Splitter for Nikon
RainSleeve Camera Rain Cover
Backpack Rain Cover (built in)
Additional batteries for cameras and flash unit.
Lens cleaning bulb, various chargers, cords and adapters...
And yes, "it all fits into the ThinkTank Streetwalker Harddrive Backpack".
Here's a list of other miscellaneous items that I carry (check-in) during travel photography assignments...
Updated to 4TB (2TB) Western Digital "My Passport" Portable USB Hard Drive
Sony XQD USB Adapter/Reader
Bose Noise Cancelling Headphones
Ankor external Battery to charge iPhone/iPad
Various AC Adapters for different countries
TSA approved locks on backpack, travel cases and suite cases.