One thing I think may be confusing the issue is the difference between VFR & IFR flight rules. Air traffic control works primarily with IFR aircraft, except within 3 miles of an airport. A waiver might cause ATC to block an area to IFR aircraft (which usually operate at altitude, or under the direct radar control of ATC as they near an airport), but they are not even going to know if an aircraft operating under VFR is in your area. If you are operating within a TCA (terminal control area) this is a bit different, hence the "permission of the airport manager if within 5 miles..." clause in the notification requirements.
All rocketry operation are under VFR flight rules, far as I can tell :)
Kevin "used to be a controller a looong time ago" OClassen
VFR = visual flight rules IFR = instrument flight rules ^ ^ apples oranges