Buzz,
Just like we say in ponds...it all depends on your objectives. If your objective is to generate income so that it will be easier to hold onto the land in the face of increasing land values, seems like the wind generation would be a logical thing to do, assuming the details are worked out in a satisfactory manner.
If you are interested only in investment value, i.e. selling the land at max profit in the future, then the answer isn't an easy one, IMO. Some, perhaps many, prospective buyers are looking for a place just like you describe, and would be deterred by the presence of a wind farm. Other buyers might be intrigued by the presence of income generating infrastructure on the property, but my guess is that the buyers with money are much more in the former category than the latter.
Large property which is isolated from development is really getting to be rare. People who seek such property generally have the money that is required to procure it.
