I realize it's not all that much weight or bulk, but I doubt I'd take the woobie. With your sleeping bag and insulated clothing I can't see needing it. I'd probably also limit myself to one insulating layer. Taking both the spindrift and superdown seems a bit redundant. Though I second the recommendation for something to help with blisters, I prefer duct tape. IME it works better than anything else I've tried and I've had some pretty serious blisters.
However, once you put it on a blister don't take it off until the hunts over. I also don't go anywhere I'm not very familiar with, without taking a GPS. FWIW.
