For me I’d just say oh well, gotta fix it when I’m home again.

Otherwise I’d probably write some script on the server, which reboots my router when the server either doesn’t have internet anymore or can’t ping itself.

I can highly recommend Magic Earth as a Google Maps alternative (also available for Android). It uses OSM data and has some traffic info. It’s not as good as Google, but it’s the closest I’ve found so far.