I've just added a page describing the trials and tribulations of installing a half-mile wifi bridge to enable some networked CCTV cameras. It all turned into a bit of a marathon, but we've got it sorted in the end. The page is here - http://darkmann-iom.blogspot.com/p/bridging-gap.html
Sometimes things don't go according to your original plans and you have to move to Plan B or make up a new plan and start all over again. Does anyone want to buy a couple of as new wifi dish antennas?