Hunters discussing Idaho's Unit 31 highlight its varied terrain, which poses both opportunities and challenges for accessing game. The unit is mentioned for having a mix of foothills and mountainous areas, requiring good physical conditioning and proper scouting. Seasonality plays a significant role, with game behavior and success rates changing from early to late seasons. Draw odds appear to be competitive, but those who do obtain tags tend to appreciate the unit for its potential, emphasizing preparedness and knowledge of the area's intricacies before a hunt.