Google Maps sucks badly at public transport in these more remote places, so it's way better to try to find which companies operate in a given region and try to find their routes and schedules. Unfortunately some of these companies also suck at publishing/keeping schedules up-to-date, so I guess next time I will try emailing em to ask. Unfortunately OSM routing providers are not better.
Talking about OSM, I wanted to thank both @openstreetmap and @organicmaps because I use them very extensively both for planning and navigation for every single one of my crazy #hiking trips. This is where I went thanks to you 💚