After coming back and accessing my equipment problems I can trace all of the issues from that one landing in South Georgia...
I tended to use my DryZone bag as a holder for my LowePro Sling bag. I would pack the sling inside the emptied DryZone, zip it up and on shore, take the sling bag out an work from that...leaving the DryZone on the beach.
But in South Georgia, short of a waterproof housing, nothing could have kept the cameras dry. I lost one 1Ds MII info LCD while shooting (it came back later in the day), the main LCD on a Digital Rebel, a 17-40 F4 gave constant Error 01's (and still does) and a 28-135 errored out, then refused to auto-focus. I recently tried it and it's now working normally (but still going back to Canon).
Other than that one landing, I don't think I had any other issues except for the normal problems of keeping track of cards and getting everything downloaded safely while having 8 different cards in rotation-4 4gigs & 4 2gigs. I only had image corruption on one card and it was my own darn fault...I popped the card lid before the camera was done writing. I was in a hurry to change cards.
After losing the two lenses, I was down to just 3 lenses; 24-70, 70-200 & a 400 F4. Other than the 17-40, it was all I really needed to bring in the first place. Course, I would have LOVED to have a preproduction model new 16-35mm. Seth and I both begged Canon to give us early units, but they weren't available, even to us.
If I were to go again, I would opt for a 300 F2.8 (like Seth was using) over the 400mm. I often found the 400 a "little too long".