All my permissions have been clients at some point. My oldest shoot I've had for over 15years. Banging on doors has never worked for me. Once you get friendly with one landowner other doors usually open. Best client I had owned a pest control business, couldn't believe my luck. You've done well to get permission for friends aswel, non of mine will accept anyone but my son to go with me. I hope they dont mess it up for you.