Always carry a pack cover. Stick it in my side pouch with my game bags. Used it once and it was awesome, as it rained steady all day. I hunt solo backpack in rugged mts of Idaho. Usually when it rains, I stand under a thick pine till it blows by. Everything stays amazingly dry.
Last day of a hunt mid-Sep, I hiked out in sleet/snow and didn't bother pulling it out...should have. Spent an hour laying out tent, bag, clothes and vest in Nevada the next day to dry it all out.