My family (or at least my wife and I) have long wanted to relocate to a different part of the country. The time is coming where it would be appropriate to start the process.

We are involved in various organizations, and I am conflicted on how and when to notify each of our plans.
1. Employer
This is actually the easiest. I will provide the obligatory notice of at least two weeks.
2. Subordinates
I am manager of a department with three employees. I am on good terms with my subordinates, and we have been through a lot together. I would like to not give them the feeling that I'm leaving them with little notice.
3. Special Co-workers
There are a handful of other co-workers with whom I've developed close friendships or have more interrelated work duties. Should I tell them before.
4. Social Organizations
We are also involved in organizations (I am a member of the church board for example). I would like to try to extricate myself gently from these organizations. I guess this one just comes down to giving them enough time to fill the roles that I had been taking care of.
5. Neighbors
They can find out when we put the house up for sale, as far as I'm concerned.
6. Friends
I'm not too worried about the friends either. We are all connected by other means of communication, and lack of physical proximity won't alter that much.
7. Relations
Some will be elated (we are moving closer), some will not (we are moving farther away (er, maybe they will be elated, as well, who knows)). We have already started the process of letting them know.

Mitigating all of this is that we are just beginning the process. Neither of us has employment in the area we are intending to move to. Nor have any housing arrangements been made. The plan is for me to start seeking employment. When something happens on that front, I will likely "move" temporarily with family in the area. My wife will continue to maintain the household in our current location, and I will seek permanent housing in our new location.

This may be way more detail that anybody cares to read. Likewise it may be more of a dilemma of etiquette rather than ethics.