You'll want red wine since you won't have refrigeration for whites. Let alone worrying about having the right temp for both Sauvignon Blanc and Chardonnay. The zombies probably want Pinot Noir for eating human flesh (I read that somewhere else, really) so don't stock up on Pinot as that will just make your fortification a zombie magnet.
Find wines to go with whatever kill you have, road or otherwise. Nothing too heavy that will slow you down as sunset nears. Maybe lay in a Tawny Port to go with Twinkies in case Woody Harrelson shows up.
Use this for a glass: