I think I've figured out how to make it work with a Seacam rig! The setup below is for a trip I'm taking tomorrow to Hawaii to shoot waves with Norb Wu. I'll also get on a boat for snorkeling with Frank Baensch.
If I were traveling with strobes, I would replace the big lenses in the Urban Disguise bag with strobes, arms/clamps, and chargers.
Special thanks to Larry Chan, who let me take a close look at his Thinktank bag last week while we were in Mexico...
Thinktank Airport Acceleration with Seacam housing, Seacam handles,
Superdome, P30 extension, extra battery for 1Ds3, 2 x external hard disks,
1ds3 charger, 1D3 camera body, 1Ds3 camera body (in housing), filters,
30 pounds loaded as you see it, plus 5.5 lbs for Macbook Pro
Thinktank Airport Acceleration bag with additional accessories on top of Superdome
Thinktank Acceleration bag, with notebook sleeve on top
Thinktank Urban Disguise 60 bag with 400/5.6L, 70-200/2.8L IS, 15mm fisheye,
1.4x teleconverter, 2x teleconverter, 24-105/4L, Sigma 20/1.8, and accessories.
2 big lens slots could be replaced with 2 strobes. 3rd slot could be replaced with arms + clamps.
Could stuff strobe chargers in front pockets.
I put chargers and cables in the back slot (which could also hold a computer).
Thinktank Urban Disguise 60 bag front pockets, each of which can hold a pro camera body
Thinktank Airport Acceleration bag and Urban Disguise 60 bag