Longer than 6 hours for you but great place to hog hunt-He does allow some gun hunting though mostly Archery. I would check out the web site. Shiloh Ranch, Stonewall, Oklahoma. Even after his fee & the longer distancewith 3-4 guys you should get in under the $500 cost your looking for. It's 14 hours for me & i don't mind it at all-always with it.
I will be going my 8th time in June. Been to several in Tx. & Oklahoma & Shiloh has been the best by far. Good Luck.