I have found the very highest shot opportunity method is to wait, and wait, and wait. If you are going crazy and at least half of your mind is screaming that it is time to get up and move, you are almost there. Soon after you resign yourself to spending the rest of your life in that stupid non productive spot, you will have action.
It is a big help to corn an area and build a blind. Then, keep baiting and wait for the proper wind to hunt the spot. I try to keep my blind at least 5 yards off the spot, preferably 10 yards. It is unbelievably hard to draw an arrow when a hog or javie is so close you can reach out and touch him. The closer you are - the more sensitive they are to movement or noise. This seems to be a geometric inverse. At 50 yards you can move and make small noises. At 20 yards you can move your bow slowly. At 4 yards you cannot blink, breathe or even think to much or they will bolt.
Javelina are a joy to hunt with trad gear. They are cute but alert, comical but dangerous. They just plain make me smile.
Big hogs are a full blown challenge. You might get lucky and stumble into one, but most are taken by experienced hunters who put in the work and woodscraft.
Gotta love Texas in the winter.