Most of the high fenced operations are far from "canned" hunts. You still have to be in good shape to chase the dogs up and down the mountains. Cherokee NF has hogs, Catoosa usually has a non-quota hunt in December and they have hogs, and Big South Fork has a hog hunt that usually runs from the end of Jan-Feb. I'm definately not an expert on hog hunting (never killed one). But, these are some options if you don't want to do the outfitter. Where in Central OH are you from? I was born in Lancaster.
I just re-read your post and saw the spring/summer deal. If you plan to hunt them in spring/summer, you'll have to go through an outfitter, or find someone that has them on private property.