anyone have plants around the mt. saint helens area?

Im from yakima washington and I have a few females that have about 3 weeks left till the buds are done. The only problem is that they are way up on chinook pass. With mt. saint helens potentially about to blow, im worried about ash. If that mountain blows, then the wind will move all the ash over that pass putting it all over my girls. Im thinking that this is a bad thing. Does anyone know what to do in this kind of a situation? Would you just pick the plant before the ash falls even though its still early?