I have never had issues in CA and neither have any of my staff that I know of except Kneeland where we had to park on one spot only to remain clear of the runway, and some of mine are pushing a bunch of downwash, Hueys and 212's etc.
Couple things.....Are you hovering high? or nice and low, say 6 inches off the ground.
Which airport claimed no helicopters? The only one I know of in California is a private airstrip that is airplanes only.
At Placerville I can see if they got mad if you hovered on the inside of the pump there closest to the fence, but not the open side. You know they have a truck at Placerville too right? (Although that may only be Jet A).
Typically if I am getting fuel at aa pump, I will wait off to the side and make it obvious I am waiting for an airplane to move, then move over once they leave.