Doesn't increase Special Encounter chance, but they do exist.
Not swift learner, it's useless in the long-run, educated is okay, if you need high skill points, Survivalist is best taken when you already have your Outdoorsman above 120 and beyond that, because it doesn't take the increased skill points needed into account.
Depending on your build, there are other great Perks like More Criticals, Toughness, etc, but out of the 4 perks you listed, I would go with Survivalist if you already have high skill, or educated.