Hunters discussing Idaho's Unit 42 generally emphasize its challenging terrain and recommend being physically prepared to tackle steep areas and cover large distances. Many note that game, particularly mule deer, tend to inhabit higher elevations, with success often depending on pre-scouting the unit before the season starts. While some users mention the difficulty of drawing tags due to high demand, those who invest the time to study the unit experience rewarding hunts. Overall, experienced hunters advise patience and persistence, suggesting a thorough understanding of deer behavior and seasonal movement patterns as key to success in this region.