"Get set up ahead of time if you can, as much vehicle living is rather impromptu (i.e., 'Get out!', or coming home to a padlock on your door), if possible, try to get the van ready beforehand." This and many other tips on living in your van, courtesy of Matt Howe in his fine essay describing his experience living in his van while attending school in Fremont, CA.
Slummin' It [Don't Come Knockin]
Concentrated Essence of 70s: The 1976 Truck-In [internal]