I think alot of the first issue is due to being lazy. Ask permission before season starts. I have 2 or three guys every year stop by my land if they see me outside and they are there to simply ask for permission to recover deer. It works both ways. I use that time to let them know where I will be hunting and I also ask permission to track deer on their land. Set some ground rules. For example check to see if there is a vehicle parked, if there is then there is a good chance someone is hunting there. Have the repect and wait until they are out of the woods. This system has worked well for us.