Everyone else does it.  I've been getting more creative than just a Westcott these days. But, I'm still a minimalist when it comes to travel. Here's what it's in the ThinkTank when I'm not on the road (no particular order):
 

click to read the whole list

Alien Bees - B1600 for some cheap reliable power
20 and 30 degree grids
Matthews RoadRags Kit  (I'll do a video about it soon...F'in rocks)
Cheapo Ring-light (finally starting to use it)
Phottix 400 watt strobe w/small pack  (it's got some kick)
Nikon SB28 flashgun
Bag of various triggers 

Senheiser shotgun mic

Primes: 50mm 1.4, 105mm 2.0
20-35mm 2.8

Genus Varying ND filter
Nikon D700 (my big gun)
D7000 (video)
Mini-Vagabond
Various grip stuff shoved in every nook & cranny
gels/gaffer tape
scrim/reflector on flip side
cleaning crap/passport copy/bunch of crap/moo cards/chargers/cords

Pretty much it.

My small 35" light bag:
2 Avenger stands
Apollo 28"
Nikon SB80DX flashgun

Backpacker Studio Bag:

No, I haven't abandoned the BPS.  When I travel I use either the ThinkTank and/or LowePro sling bag.  I transfer everything over (minus the big lights)

I'd love to hear from you!  Email me!!!

Mikey