Buddy, this is a tough situation and I seriously doubt things are over yet. In fact, I think things are ramping up.
In this situation, I think I would be very defensive, keep the kids close to home in the back yard, wear your sidearm in the house, be vigilant when leaving as the way you describe the neighborhood as having one way in and out.
Be especially mindful of your neighbor across the street and keep the police informed of the comings and going. In fact I would set down and develop a defensive plan with your family and neighbors.
I know how you feel about being a protector, but where I live all of my neighbors are well armed. In rural Missouri hunting is something everyone does and virtually all homes have multiple weapons in them.
Keep us informed on the evnts.