I'd just spent a few hundred bucks buying good fall camo hunting gear so I didnt want to shell out any more money than I had to for winter gear. This is a Tyvek suit that I purchased for 7 dollars at a local industrial supply store (Airgas) and painted with a black magic marker. They are available in sizes from super small to extremely HUGE. IIRC this is a 2x and fits over all my very bulky winter gear with room to move. (Im 6'4 ~260) I believe they have them up to 5 or 6XL.
This stuff is pretty much waterproof, windproof, and very light weight. A great addition to any day pack, summer or winter. (nothings more eye catching in a summer survival situation than pure white, IMHO)
Post up what you have done for cheap camo.