It's not a matter of intentionally camping somewhere, but if that somewhere is where I want to go I will camp there unless something dangerous is expected. 15-20 MPH winds are not dangerous and they really are not an inconvenience either.
Wind, I've been in wind! but calling 15-20 MPH WIND is just silly. That's a nice breeze which simply limits your ability to cook outdoors.
As to wind generators, most RVers are not going to be parked where these kinds of winds are available on a regular basis (but could be a good "driving down the road" source) so other, more practical options such as solar (the thing the RVers like the most!) leave the limited options available from wind in the dust.
We are currently in NV. Not much wind going on here (I have yet to see one windmill) but solar is EVERYWHERE.