I've picked up a lot of maps and researched a lot around my main bug out route. Since my farm is in another state I have about 250 miles or 1/2 tank of gas during normal times. Detours, slow moving off road, traffic jams, etc will stretch that out.
I've started mapping out all the parks along the way and make day trips there so I get more familiar with back roads and interesting things along the way. Handheld gps logs the route along the way so I just have to take a picture of anything that looks interesting and match up the picture time with the gps log.