If you’re going to be in national forest land, the Forest Service has maps you can use in Avenza Maps that are geotagged - probably the wrong term but they work in areas of the forest with no cell service and it still shows where we are and even when we’re moving.
Other federal agencies (BLM, FWS, etc) may have them too. You could even see if the area’s counties have some? I only have direct experience with USFS maps that do this but I doubt they’re the only ones.
Eta: After looking at some iGo screenshots, Avenza probably won’t be a good fit. It doesn’t offer turn by turn directions nor does it automatically center on you. If you drive out of frame you do have to manually move the map.
If you’re going to be in national forest land, the Forest Service has maps you can use in Avenza Maps that are geotagged - probably the wrong term but they work in areas of the forest with no cell service and it still shows where we are and even when we’re moving.
Other federal agencies (BLM, FWS, etc) may have them too. You could even see if the area’s counties have some? I only have direct experience with USFS maps that do this but I doubt they’re the only ones.
Eta: After looking at some iGo screenshots, Avenza probably won’t be a good fit. It doesn’t offer turn by turn directions nor does it automatically center on you. If you drive out of frame you do have to manually move the map.