I get rained on or snowed on a lot when sitting out in the woods for extended periods. I couldn't find an effective way to prevent rust on it that would still be food safe. All of them wore off after a few days in the field. Plus cleaning a deer puts a lot of moisture on that blade and if I had ardy been out for several days and the mineral oil had worn off the deer blood would rust it out fast.
Sounds like stainless is the way to go then.
Any carbon steel will rust sooner or later in wet conditions.
Plus, for cleaning deer and stuff, the extra edge retention of some of the "super steels" might make you happy.
