Purchasing two maps and using them jointly will help. First, purchase a U.S. Forest Service map for the specific area you intend to hunt. These maps clearly denote the ownership status between private and public land. The maps show most trails, roads, highways, waterways and campgrounds. Also obtain a United States Geological Survey (USGS) topographical map. USGS maps don't show private and public land ownership, but they do provide a detailed view of the terrain not seen on the Forest Service map. By comparing the two and transferring ownership information to the USGS map, there should be no question of your location.