Has anyone worked with local heliports associated with hospitals or similar facilities that don't have a control tower in an effort to coordinate your flight activities? I have 4 within 3.6 miles of my home and am getting mixed messages from them about how much or how little they want to be apprised of my flights. One says as long as I am operating at or beyond 3 miles from them and within FAA guidelines, they are fine. One says they would prefer I inform the local airport which provides flight clearances for their activities but that airport says they only want to know of my flights within 5 miles from their own facilities. I get the impression those heliports aren't prepared to deal with us and would be ust as happy if we don't bother them. We, on the other hand, appear to have a FAA requirement to inform any airport facility within 5 miles of our activities . Thoughts or experiences in dealing with this issue?