I'm in your area. I am not from here, though, and I am still coming to terms with the retarded hillbilly, holier-than-thou, incarcerate-everyone-for-the-slightest-infraction culture.
That said, I grew a few plants this year, after being out of the weed culture for 30 years. In the countryside, you should be able to find suitable growing spaces. I understand the desirablity of not growing on your own land, but there's also the unknowable users of land that's not yours. I suggest a several plots with no more than a few plants each. I have heard that pine trees camoflage the plants from the air, and also provide cover in the fall when everything else turns brown. I like areas where the trees have been harvested 3 to 5 years earlier, so there is vegitation of similar size to the plants. I don't relish climbing through thorny brambles, but I prefer to plant there assuming that most people will avoid those areas. Having flown over my property in a small Cessna, it is pretty damn hard to distinguish weed from more than a few hundred feet up. I am surrounded by thousands of acres of timber land. I feel that the likelihood of being spotted from the air is negligable. My biggest worry is deer, rabbits and hunters. For the first two, I use chicken wire cut to 8 foot lengths and staked to the ground. For the latter, brambles and poison ivy.
Good luck.
that said, i will second what charliedog said about the 3-5 year old pines. there does seem to be quite an abundance of those around here, and they seem like great cover. they're also short enough that they won't block the sunlight. 
