I think that, rather than using Gmaps WV, one should rather opt to using Osm maps.They client is free software and the map data is collected by volunteers all around the world, doing their best to contribute to the project.
That way, you can still use navigation and you won't ever need a Google account (or an accoint for anything, really).
As for Google play, yeah, I definetely recommend Aurora store.
Personally, I use Aptoide to get my apps from, because that's entirely independent of Google servers and it's its own thing, so it's even better. However, I wouldn't recommend it personally because a lot of apps that existed on Google Play don't exist on Aptoide's apps repository and the third party repos are not very trustworthy
OSM is very region dependent. I absolutely love the software and how so many people across the world have contributed to it, but I really don't want to get lost and just looking at the map of my own neighborhood I'm afraid that would be the case if I go anywhere else. I'd at least keep the GMaps app on standby just in case.