Easy! At least on iphone, photos you delete are saved in the trash for 30 days. So - take the photo, and immediately delete it. Assuming you're not parking for

Easy! At least on iphone, photos you delete are saved in the trash for 30 days. So - take the photo, and immediately delete it. Assuming you're not parking for more than a month, your photo will be in the trash if you need it, and will be automatically deleted if you don't!