The airport you are thinking of close to Hollister is the Aero Plantation private air strip. About 8 or 10 planes, maybe a couple of more. All small aircraft, nothing bigger than a 4 or 6 seater. Never hear'em, and won't bother you at all when you do see them.
note: The aero runway is roughly parallel to Twelve Mile Creek Road, so the takeoffs and landings are not over Hollister.
2nd note: see this thread about Hollister if you are thinking about buying there:
//www.city-data.com/forum/charl...rovidence.html