davlandrum-
A lot of pig guides in California are located within 50 miles of Fort Hunter Liggett, so you would be hunting in the same type of country. Hills, lots of brush, oak flats, some deep gulleys and ravines. I would highly recommend hunting the fort if you are going to be in the area.
With a rifle, you can take any shot offered, but with a bow you have to get close enough to place your shot. I used to shoot a recurve (60 lbs) out to about 50 yds max, but with a fast compound you don't get much more of an advantage. Still, a broadhead right behind the shoulder is all it takes. All those stories about pigs being bulletproof and all that are just stories. Yes, they're tough, but a double lung shot will put them right down. Just don't shoot them too far back, because then the pig will show you how much ground they can cover.
Pigs are not that tough to kill, and are a lot of fun to hunt, but taking one with a bow is very challenging. They can't see very well, but inside of 200 yds they'll spot you right off if you aren't careful. And needless to say, they got great noses, so stay downwind of them. When I bowhunted in CA, I used to glass the pigs early in the morning, then try to ambush them on their way back to the brush and creek bottoms. It isn't real hard, but it can be a guessing game as to which way they'll move. Pigs roam over a lot of ground, so they are not always in the same areas day after day. Good luck!!