So, we're going on a backpacking trip next weekend, and I expect at least a couple feet of snow on the ground when we get there. I'm thinking of testing out a cattarp 2.5 from oware, pitched pretty low over the ground, but under it, I think I'm going to try to dig out a little sleeping area, maybe 7' by 4' or 5'. So basically, i'll have the front open, and the back closed almost (if not directly to) the ground, and the sides pretty close to the ground. Inside i'll be in a MYOG bivy, and probably use a sheet of visqueen as a groundsheet just in case. I'll throw down a walmart blue foam pad under my insulated air core, and will be on top of those two in a 0degree down bag. I don't expect the temperatures to drop below 6 degrees(F) at night... Do you guys think this shelter system will be sufficient? Or will I probably end up bailing to a friend's 3 season tent? I don't expect ANY rain, and it's in a pretty wooded area, so I don't really expect too much wind either...