Load the apps and maps. It's all over the web so try this article
http://home.bt.com/tech-gadgets/tech-news/at-last-google-maps-just-introduced-offline-navigation-and-search-but-its-only-on-android-at-the-moment-11364015811212
Tablet with GPS? Sure. https://www.amazon.com/dp/B01J8D2JT4/
Still have to mount, power, fiddle.
I'm using a Garmin Nuvi with lifetime maps.
Are there any sat nav systems at the moment which run google maps?

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