A RV isn't without its advantages. You ever try cooking a hot meal when it is raining outside?
However Fairly certain every state has a massive "RVs for sale Lot" with brand new RVs allover the place.
They also haven't yet raided an national guard depots nor have the de-gunned either of the M1 tanks they've passed. The one in downtown atlanta probably couldn't be stripped but the one from the CDC episode clearly had a M2 and m240 just sitting there. There had to be a bradley around too which is not only zombie proof but can safely carry people and cargo around.
I love the show but clearly they aren't or havent made much of an effort to suggest that survival is anything less that complete dumb luck.
Also, wtf, they're in the south and they keep making it seem like guns are rare or hard to come by. Come again? In the south? Even if you temporarily found yourself un-armed, pawn shops, walmarts, sporting goods stores, any random house ... your back in business. I could buy it if say they were in new york city but not in atlanta georgia.