Looking at the maps on myGMRS, there seems to be at least one repeater that could cover Lineville and Ashland. I suggest you contact the repeater owner and get permission. Usually if there’s a repeater, there are other users in the area that may be willing to reach out to you. Good luck.
My personal experience was finding repeaters in the area, accessing the repeater, giving my call sign and monitoring. I took a few days but once I made one contact others soon followed.