Oh! Also, with horses, be sure to scan all of them. I killed a bunch of O'driscolls and one of them had a pretty, brindle thoroughbred that had excellent speed and balance. Don't be afraid to swap em out.
I started a new game with the intention of doing a full FPS run, but I find that using it as a tool for better aiming just helps. It's fun being able to play at a slower pace, catching shit I missed before. Don't skip out on specific character mini missions at camp. Some are missable and you get some great character development. I missed a few first go, so I gotta pick some more of those up.