The group needs an objective. Not just lets settle down and be alive,...zombie shows are always better when the group is moving.
It might take them away from the comics... but traveling cross country would open up unlimited story lines.
Maybe a small military group shows up. Says they are travelling the country to let people know that a cure has been found and there is safe haven. The government has been restored and the entire city of Reno, NV has been cleared and walled...they just have to get there to be safe.
It would take a few seasons to travel.. when they get there of course there has to be a season of blending in, feeling safe, being assigned to various work crews... then there are the possibilities of varying leadership ideas, competing factions within Reno... then the huge zombie horde coming over the mountain that nobody saw coming... then in flight again, and with all that wide open desert there is no place to hide...
of course... nothing changes the fact that once the initial shock is passed a slightly organized military force should be able to end the zombie threat when you are dealing with Romero zombies