I wore a pair of deer hide gloves for "dress gloves" -- driving into the office, Sunday mornings to church, evening activities for about 4 years. They wore as well as any other gloves I used that way, I think. They are a soft, subtle leather and won't hold up nearly as well for bailing hay and fixing fence.
I prefer to use canning salt. It is a larger grain of salt. USA Foxx & Furs suggested contacting a local agricultural supply store to get salt from them; it should be easier to get in larger quantities and in the larger grain size.
For completely drying a hide before sending it in, you'll need quite a bit -- maybe more than 25 pounds. This is because you salt it once and let the liquid build an be removed, then you salt it again and monitor it for the right dryness/stiffness. If you're going to send it in to be fleshed, but are salting it to help preserve it during shipping, you can get by with half as much or less.
Good luck!