I just googled up "wind generators" and it brought up a lot of sites, including some that are dedicated to rv/boat.
Also, Amazon lists quite a few.
We don't boondock now, but have several longer 3-4 month trips planned in the next two years, and I'm sure we'll be camping without hookups several times. Just looking for an alternate to solar to keep batteries up. Something easy and light to set up.
Smaller units seem to weigh 15-18 lbs with a 3 foot diameter blade, pops out 400 watts, about 3 1/2 amps. Should be enough to keep batteries topped up.
Just in the looking/thinking about it stage.