Electronics? What are those?

I try to keep as little as possible that is more complicated than a flashlight in my gear. The lights are made to be waterproof, they get a dab of grease when needed. For other stuff, electronics project boxes with a gasket work very well, so does an altoids (or similiar) tin with a could layers of good electricians tape. With the later, if you want to be sure, two good ziplock bags, and then a no-name zipper bag that is then mummified in duct tape.