Big, big fan of the Pelican 1550. I use that with my RB67, 2 lenses, 120 back, Polaroid back, 45mm extension tube, and I still have plenty of room left over for film & accessories. I believe I could probably throw in another lens or two.
For the "wedding trunk" I use the Pelican 1650. I've spent 22 years in the military as well and swear by these Pelican cases. They can take a serious beating (water is nothing) and still come out unscathed.