I'm going to assume "facts" not in evidence, since you didn't say anything about where the zombie horde is coming from, and assume that they're coming from the nearest population center (the local city)...
In which case my actions are the same as if the city center is consumed with rioters, who have consumed all the resources they had and have begun raiding stores and homes outside their own milieux, and my van is inoperable or impractical for security reasons...
I pick up my ruck and my rifle, hand my wife her much smaller backpack, and move out roughly SSE along secondary roads, staying 50m inside the treeline whenever practicable; get five miles out and hole up until nightfall, and then move by night with noise and light discipline, checking out unfamiliar noises with my civvie IR goggles (while wishing for the AN/PVS-7s* I had during Gulf War I). First good hide location is a bit more than 20 miles out thataway.
*I may have the nomenclature wrong. Gimme a break, it's been 20 years.