I am looking at potentially running a Seek Outside DST as my shelter across all seasons. I would also be using as a quick pitch option for sitting through rain/snow and for glassing. Would be using this tarp September through November in TN (so temps could be anywhere from 60s to 20s with rain or snow possible later) as well as October in CO. I would also be running a Klymit insulated pad and an EE Enigma synthetic quilt. I have no intention of packing a stove, but even without that would a shelter with an annex/door make more sense as a one-and-done option? Do you other flat tarp users have issues with weather getting in on you in colder seasons?