I now always jump in with mine; both RIB & hard boat. I find the disadvantages of camera retreival after entry (finning against the current, dodging other divers, inexperienced handler) far outweigh any potential problem of taking it with me.
Off the RIB: backwards roll, camera at arms length & negative entry (gets you away from the others, less chance of collision).
Hard boat: giant stride, positive buoyancy, camera held high.
I've done over 200 dives like this & no problems to report (D100/DX100 & strobes).
IMHO the bigger risk is to be found in the rinse tank!!!