I want to ask directions when I have a Wifi connections, then preview the route and store the maps offline for the entire route - so that when I'm underway I can just let GPS pick up my location and show me a map (and preferably the directions).
I can store single maps if I'm not in directions preview, but can I do it while I'm previewing directions?
I found these posts with many alternatives but first I'm looking for a solution in the Google Maps app itself.