Not sure about maps, but do some reading and figure out an area with potential. You want to find private ground opportunities, to avoid those all day hunts where fellas walk all day to try to get a limit. Spend a day or weekend in the area you want to hunt and meet some of the locals. Stop in a couple of the nearby towns, eat an early and late breakfast at different diners/cafes/bars (same with lunch) and ask about bird hunting, who farms, get some names, phone numbers, maybe address or directions to their place if lucky...with a name and internet access you can likely find their home. Don't forget the fella's name that gives you information and drop that when talking with the landowner/farmers. Write all the intel down as you talk to your contact, take good notes.
I would recommend not calling, but try to locate and visit the landowners/farmers first. Try to not dress like a city kid. Drive an American made 4x4 pick-up, if you have one or can borrow one, it might be that thing you have in common, and that is what you are trying to establish. Talk about the rain or lack of it, how the crops look, try to make it look like you have a clue about rural America. After the small talk, let them know why you are there. If they are still listening, assure them you are not going to bring an army with you or a trailer full of dogs, and then don't. Promise not to drive in where you shouldn't be (anywhere you are leaving ruts) if it is muddy, and you'll leave gates the way you found them. Stop back at the farm after you finish, let them know how you did and that you really appreciate them sharing their land with you. Maybe have a small unique gift that they can remember you by. I don't need to do this for bird hunting, but I do for getting prairie dawg shooting opportunities. Good luck!
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