Use the largest possible legal caliber weapon with a fast rate of fire of multiple rounds. During small game I use a .22 magnum semi-auto with 10 round magazines. During rifle season I use a .444 lever action with 5 round capacity.
Plus a 10mm Glock sidearm if you have a valid CHP. I've had to pull my sidearm before. Scary when you've got an angry boar tearing at you and your rifle misfires. Your sidearm should be the largest caliber that you can safely manage... think stopping power.
When stalking, whoever (you or the hog) sees, smells, or hears the other one first will win. So play the wind and move slowly and quietly. Leaves on the ground are much quieter in the morning than in the afternoon.
One of the best hog hunting investments I ever made was a backpackable game cart. Forgot the brand, but it weighs like 15# and has backpack shoulder straps. Was under $100. Unfolds to hold up to approximately 200# beast. Much easier to roll them out of the woods over great distance than trying to drag with a rope.
The best public land hunting is where other humans do not go. A year or two ago I saw a guy spray a whole can of OFF! on him at daybreak before he went into the woods. Moron. If you drive up to a spot and there is a vehicle parked there, keep driving to another spot. I hunt in Pearl River. It's 35,000 acres. Plenty of space.
Activate a GPS tracking map on your cell before heading into the woods. Really beneficial if you get turned around. I use the "US Topo Maps" app. Well worth the $5 or whatever I paid for it.