My suggestion is forget trying to get her into knives and outdoors at the same time. Start with outdoors.
1. Plan a walk by a lake or through a forest or whatever is near you that's nice.
2. Plan a picnic using the same idea of a nice natural destination. Use your KA-BAR Heavy Bowie to spread the peanut butter and jelly on your sandwiches. Stare at her with one eyebrow arched the entire time you're doing this, but don't say anything.
3. Plan a one-night camping trip in a nearby place that has formal campgrounds and a nice natural place to hike nearby. Make sure there are bathrooms. Bring some simple cleaning supplies and touch up the bathroom before she has to use it for the first time (sweep, get the dead bugs and spider webs out of the corners, spray some cleaning solution on the john, spray some citrus scent around the room, make sure the lid is down when you leave if it's a pit toilet).
4. Alternate planning walks, hikes, and camping trips. Try to make the first batch as 'civilized' as possible.
You'll get to the point where either she clearly hates it all and you're definitively screwed, or she's on board with the outdoorsin' and you can then start in with the whole knife thing. By this time you'll have brought your knives and been using them, hopefully not in some lunatic manner, and she'll see the value and who knows, maybe (MAYBE) become a knife nut too.