+1 on what others said. I'll add to that another good tip. Make up some large 8x11" cards on card stock paper, available at Walmart. Fold it in half, and print a nice note to the landowner. Have photos of yourself and of your vehicle on the card, along with a tag number, address, phone number etc. I print on 4 sides. The card when finished looks much like a greeting card, but just personal with all your information.
One land owner told me "I wish everyone did this." Everything was on that card that he needed to know about me - my picture, picture of my truck, tag number and everything along with a nice note I wrote.