Unfortunately, most cities don't have enough officers on duty at a time to respond quickly to every call, so narcotics calls - among other things - are normally not a high priority. Things like fights, domestic violence, etc. will be dispatched first.
Does your local PD/sheriff's department have a narcotics task force? If so, contact them and provide as much detailed information as possible. Documenting the activity, especially specific info about vehicles (descriptions and license plates), people involved (if you know the names of the residents), etc. will help them build a case. Because of the way the system works it is usually not an overnight process to shut down a drug house.
Taking photos/video is a great idea, but do it safely and discreetly - as bad as things are now, getting hurt or killed won't make it any better. I'm sure you're already aware, but people who use and deal drugs are normally not very mentally stable. Don't jeopardize yourself or your family.
Calling in false reports is not only illegal, but it may also keep officers from responding to true emergencies. If you were the one needing immediate help would you want the police to be stuck on a bogus call?