Here is a handy item you should go invest in.
After one of my recent workshops where we encountered more than our fair share of rain, I wanted to post this as a good idea for you to go out and buy.
As you know, when out in the field, anything can happen, so keep your electronics protected by keeping them in an OverBoard Waterproof Dry Tube Bag when not in use. This roll-top waterproof bag can be used to store cameras, batteries, lenses, and cell phones—everything a photographer wants kept away from excess moisture.