The camping in the schools is a good idea - and you don't have to be in the "city" of Anchorage. The Anchorage school district extends all the way to Chugiak, and there are some superbly beautiful school grounds in Eagle River and Chugiak - surrounded by nothing but wilderness, not houses and busy streets... My children attended Alpenglow and Birchwood ABC, which both have wonderful settings/view. But really any school in Eagle River or Chugiak would be amazing!
2012 Dutchmen Voltage Epic 3795
2010 Dodge 3500 DRW MC
2009 GMC 2500 DA CC
2012 Smart-for-two (sometimes hitches a ride in the Voltage!)
2005 Sundowner Sunlite 777