We found an agent in our area that specializes in land/cabin properties. You want an agent that is willing to drive with you for an hour or more to view property, and is not afraid to help get the car un-stuck on muddy roads. The advantage of having a relationship with a buyer's agent is that you can move more quickly when a good listing comes on the market. Land with good value will not stay on the market long.

Also google earth is useful, or your county may have a GIS tool on their website you can use to view property boundaries, example: http://maps.boco.solutions/propertysearch/