Lots opf good tips and advice, much echoes my experience. Cold calls- very remote chance, for this season. If you drop of your resume-yep resume-and chat up the landowner, you'll probably still get a no for this year. If you drop by again the next fall or summer just to chat, and then again the following year, you are no longer a stranger, now they know you. Your chances just got better.
Church, work, friends of friends, work your contacts to the maximum.
About that resume-it's you hunting resume, and it matches you business cards. It has your name and addy and tx on it, as well as your wife and kids, your dog, your job, your safe hunting record, volunteer work, conservation memberships, and a couple of other landowners who are references. Not many landowners have seen that, I'll wager.
If that gets you a spot, see if you can invite me one time, too.