Hunters discussing Unit 15A in Arizona highlight the unit's challenging terrain, characterized by rugged landscapes that demand physical preparation. They advise focusing on water sources as key locations for spotting game, especially during the hotter months when animals are more likely to frequent these areas. There is a consensus that draw odds can be competitive, so planning and persistence are crucial for success. Overall, hunters recommend scouting trips to familiarize oneself with the terrain and improve seasonal awareness of game movements.