So Maine has an implied access law, if land isn't posted then it is open for you to access and hunt on.

Now with that said, I always, and I mean ALWAYS ask landowners if I can access their land for hunting.

It is a much better way to go about it. In my case I have two spots I can hunt, one (75 acres) the landowner asked me to fully post for them so that myself and a friend are the only ones hunting there, and another in an adjoining town I have a 50 acre lot surrounded on three sides by large plots.

That land owner was so happy I asked to get access, that he said if I see anyone else...tell them to get lost. its mine to hunt as I see fit.

Now I wouldn't kick someone out, it isn't posted and that's just a dick move in my mind, so I would tell them to go see the landowner, or work with me to hunt it so that we both can be successful.

Look up GIS maps in your area, find large lots and reach out tot he owners of the land and ask them for access.