Jake Meador has a great little essay on the need to avoid creating retreats by creating homes, and he points to Francis Schaeffer as a model. Give it a read.
On this note, I would also add that “intentional community” had better include an intention to be morally upright, kind to others, and faithful to God and His word. If it’s just a bunch of subcultural interests, then it won’t provide any solution at all to the outside culture, and your kids will be the first to know it.