There is no "ideal" plan in sight. The TV series is nowhere near caught up with the comic, and nothing has been anywhere near an endgame there either.
I would go into more detail, but that would only be spoilers. They are panicked, hungry, scared and sometimes irrational. There is no endgame at this point in the TV series or the comic. There are merely reposes that the group hopes may be an endgame.
As creator Robert Kirkman said in the comic, it's not the zombies who are "The Walking Dead."