To prevent mold growth in your camper storage, it's important to clean and dry your camper thoroughly before storing it, use a dehumidifier or moisture-absorbing products, check the storage space regularly for any signs of mold or moisture, and consider using mold-resistant products in your camper's interior. These measures help keep the storage space dry and prevent the growth of mold, which can cause damage to your camper and be harmful to your health.