The only atlases we use are a set of Benchmark atlases - one whole atlas for each state - so detail is incredible.
We do not like to assume that access to the cellular system will be available when we travel - and many times it isn't. So along with the hardcopy Benchmark atlases, we use a satellite based Garmin navigator unit to help guide us around. We load up huge and updated databases (700K to 800K locations) in the Garmin unit before each RV trip - including all Walmart store locations, plus a whole lot more. The updated master map stored in our Garmin navigator includes the U.S., Canada, and Mexico.
