Okay, everyone prepare to laugh. Remember the answer to any question that begins "Wildcat can you draw..." is
NO.
This is really wide, I didn't intend it but it is so here's a link.
http://i.imgur.com/M2Nc6.jpg
Here is a thumbnail.
Yellow areas - all basic directions of attack, more or less, to help me visualize various ways they could come at us.
Town Hall - Civilians hiding here.
Orange box - If Milburne is right, this is what the Comanche will want to hit the hardest. Warehouse, the stores, etc. are in this box.
Red rectangle - The kill zone, we want to lure them toward here.
Blue lines - The approximate perimeter I can see we need to set up. We could do more or less but somebody has to suggest a starting point.
I think the basic idea is to dig ditches, pile up junk, string wire, etc. to create a path of least resistance toward the general direction of that red rectangle.