I use Gore-Tex from head to toe. Hadnt had a problem so far. I dont care if it is raining or not, if I am hunting. I also take a cheap plastic poncho, just in case it rains very hard, that way I protect my gear, rifle and backpack.
I dont hunt in snow, only eventually we get snow on the highlands in the mountains I hunt in, so I hadnt proved my equipment in snowing conditions.
Probably the guys that hunt in Alaska can give us a great advice about rain gear???