i would find a place i knew like the back of my hand..trying
  to bug out into unknown space would be a waste of time..if
   you really felt that you need to abandon your home and had
   BML land close enought to walk into i would find some spots
   NOW and cut and stack wood and bury supplys as far away from
   roads as i could walk in 5 or 6 hours on a "marked" but hidden
   trail...if you are out of a city thats a good start..some of 
    the older outdoor books give tips on a "masked camp"..you
   might want to look those up..
     reading back over this i would make several supply spots
    spaced out and hidden as travel might be hard to your first
     choice.....