I say your a fool to think that. You can get hypothermia as quickly as anyone else. Coming out of a cold Maine winter is an asset, but doesn't make you superman.
As for your gear list, I would add long johns and a long sleeve thermal base top. They can be light weight, but you really should have them. As it is you have no "camp" or sleep clothes. Trade off the camp shoes if you want to keep the weight about the same. Even with those added, your a bit marginal for March, based on historical records. But you never know, we might just not get a winter on the east coast this year.