Cool, D2 should serve you pretty well. Go with a "toothy" edge, around 600 grit, fine DMT stone or even a medium if you want something with a bit more bite if you are cutting rope and twine often.
I would suggest a coarse/fine diamond DMT diafold and a strop. If you want something for your hiking pack, then check out the Lansky diamond rods., I would also suggest a fine.
The D2 will work well for most knife based utility whole outdoors (hiking/hunting), shouldn't rust that readily. It should hold up fine for the inadvertent contact with bone if used to clean game (deer, hog, etc.) Though the blade shape isn't ideal for skinning.
Next time you are at the food store, grab a pack of magic erasers and a small (size of a quarter) container of carmex, the lip balm. The container screws shut so it won't leak in the summer, it is food safe, can act as an impromptu blade protectant and should be able to act as a fire starter on tinder. Regarding the magic eraser, cut off a 1"x1" cube for field cleaning if you do experience some rust. Store it in a clean and dirt free area in the interim.
Welcome to the forum.