Thought about some type of shooting "condom" (I think ThinkTank has something like this) but feel like it is too much trouble. While sometimes cumbersome, I bring a small folding umbrella with me. Then, under its shadow, I take my camera out of an AW bag and shoot. I've done this repetitively,, even while trekking away from civilization for days. I've thought about jury rigging an umbrella to a tripod but never have.
BTW, I do also have a trash bag for "belt and suspenders" caution. Despite water resistance, I try to keep everything dry