Hunters discussing Idaho's Unit 66A highlight varying terrain, with some areas offering easier access and others being more challenging, requiring preparedness for different habitats. The majority recommend targeting the higher elevations during early seasons for better success with elk and suggest focusing on lower elevations as the season progresses. Several users emphasize the importance of understanding draw odds, as this unit can be competitive and suggest strategizing early. The sentiment generally underscores the need for thorough preparation in studying maps and understanding migration patterns to increase hunting success in this unit.