I'd suggest either TX or FL. Those are the two primary free range hunting states where you can do what it seems you want. TN is another big state on hog hunting but most all of it is inside fenced areas and most of them pen raised hogs. Not all mind you but most. They primarily use dogs in TN and stands. Not a lot of walk and stalk there.
I hope you realize that what you are asking for limits the chances of you being successful. In fence operations from stands and/or with dogs success rates pretty much run 100%. But in all honestly the majority of such hunts are for hogs raised in pens and turned loose in a limited area inside a hog proof fence a relatively short time before the hunt.
Even in FL and TX most of the hunting is done from stands and in TX often at night.
One place I can recommend in TX is the Nail Ranch. Several of the GBO members have been. It's free range with no hog proof fences on huge acreage and you can stalk if you like. That's the most common method there as I understand it. Success is NOT guranteed.
I'm not familiar with the places in FL enough to recommend a no fence stalk hunt operation there. Now I do have experience at Carter's Pasture in north FL. It's a high fence area of about 1100 acres so thick neither you nor the hogs will have a clue the fence is there. They prefer hunts from shooting houses but you might talk Mike into a stalk hunt. WOuld definitely be all the challenge you'd want IF he will allow it.
Jim Reed of the Reed Ranch (make contact thru
www.Texasboards.com will I'm sure let you stalk the bottoms for hogs if you ask. He normally hunts primary over feeders at night but if you ask he likely would let you stalk. Free range with no fence and no gurantees.