Bugging out would be a nightmare for me on so many levels, so unless my community becomes uninhabitable, I am staying here.
As far as setting up a community, I have zero fantasies about what that life can lead to. I've visited self-sustaining communes and know people who were raised in them. In my experience those places always have some kind of major dysfunction or drama within the group. Most of the time it had to do with money, laziness, or people sleeping with each other. Sadly, I also know several children who were molested in a couple of the different commune groups. I'm not saying all communal living situations are like this, but I've seen a lot. Thanks, but no thanks.
My ideal scenario would be to remain here in my own house and community, providing for my family and just linking up with others for security and bartering purposes. The key to that sort of situation being successful is good communication and checking in with your neighbors a lot. Holding regular meetings to talk about and formulate security plans and meet needs. I would like to think that people would naturally fall into roles that suit them best, based on demand within the community and their own skills sets. But roles could be assigned too.
I think what WW is saying about prepping in your mind above all else is right on. Develop your skills, build a good library and those things will give you a good basis to work from. The most valuable prep in the world is having a mind full of knowledge and the ability to make something out of nothing using your skills and the items that are available to you.
As far as my own skills, I have a lot of them...fishing, butchering, food preservation, first aid, bartering, and an attitude of resourcefulness. I am really good at crafting something I need out of something else I have on hand. I can look at an object and find alternative uses for it.
Also, as WW suggested, I am always working to learn new things or develop my skills further. I really want to learn small engine repair, how to build solar panels, develop my foraging and shooting skills, etc. These are all on my bucket list for 2013. Sit down and make your own skills list. That's the best place to start as a prepper.