You can download sections of the map on Google Maps now. This is designed for data black spots. So you can download the area of the map you will be travelling in, before you start your journey.

John
January 2022

If you have a smartphone remember there's always Google Maps.

If you don't want to rack up charges for mobile data, you could look at Navmii, which is free and keeps the maps on your phone

Eeehj
January 2022

I found this, which may help.

https://howtomendit.com/answers.php?id=121587

Eeehj
January 2022