Location research from home: YouTube grid, locationscout, Google Earth 3D
He packs for Slovenia with a JPEG of other people's shots on his phone.
Demonstrated live for Lake Bled. Search YouTube for '[destination] drone', favouring short curated films (under ~5 minutes) over hour-long raw compilations; screenshot the shots worth replicating (Cmd-Option-3 while full-screen); lay them out in Photoshop (document sized to screenshot width x columns, guide layout via View > Guides), shrink, export as one JPEG for the phone. locationscout.net (free account) maps user-submitted photo spots with sun position, sunrise/sunset and comments. Google Earth 3D for terrain and sightlines - e.g. finding a hill high enough to get a panoramic of the whole lake while staying under the legal altitude; Street View for ground-level detail; and Google '[place] drone' for restrictions - Triglav National Park next to Bled being the example.
A repeatable pre-trip routine; the Photoshop grid is a nice touch any client shoot could use.