Upload & Sell: Off
That's right, why take risks if they can be avoided. However, if the benefit of those pictures being taken outweighs the penaly of a totalled camera, then by all means, dunk the sucker.
Peter, SoCal = sun all the time, unless it rains, then it pours so hard you can barely see. However, plastic garbage bags have been made holy, known to have covered this viking and his 500mm sword, before sealing was even a thought. A trip to the hardware store cures, we don't really need fancy to protect.
As for dunking, a T90 and 24 f2 sit on a shelf, a reminder the self drys off but gearz do not. A slippery jagged rock, rugged coastline of Big Sur, a youngster submerged in the Pacific's saltiness...Kodachrome and battery are still in camera...fun in the sun, no rain