Hmmm, I don't go to any extraordinary lengths to protect my gear. The cap stay on it unless shooting even when in a padded camera bag. No filters unless I need a ND or polarizer, I shoot in freshwater creeks alot and don't even worry about it then. Hawaii and it's salt water environment was the only time I took precaution against water spray. If shooting in rain I use a plastic bag rubberbanded to the hood and another one over th body itself. I normally have two bodies with me on the sidelines at football games. One on a strap around my neck and the other one in my hand. If I'm kneeling and put one down it's always right at my feet. When working in sub zero temps I just keep everything nice and cold. Even if driving around in those temps I keep the heat off and the windows open. Oh yeah, and make sure you don't breathe on your equipment or instant ice! To me the best protection is a rider on your home owners insurance covering your gear against damage/loss in the field. But really, common sense care should do fine. I've been at this almost 20 years and have never damaged a lens. This despite a rushing moose taking out a tripod and camera once, and a few other mishaps over the years. I always managed to get the gear to the ground as I fell so it never got damaged. Of course now I'd be the thing to break in a fall, LOL!!