It's the battle of the "haves" _vs_ the "have-nots". It's inherent for folks to b*tch, whine and complain.
I used to fly at the B'ham R/C field near Morris, AL. The club OWNS a 33+ acre flying site in the middle of 700 acres of strip mined land. All was well until some "PWT" moved a single-wide in on a relative's land next to the field, and then the "BWC's" started in. I measured a noise level of some 50 dB at the house. The club did formally rezone the property as "recreational", which may give more protection if the situation heats up.
The best solution may be to call cousin Kneecap Charlie in for negotiations...