- Make sure the camera date and time are set correctly.
- Start up the GeoTracker app on the phone, make sure it's got a GPS signal, start recording and then forget about it.
- Wander around, sometimes getting lost, and take photos with nary a care about GPS or Geotagging. I'll occasionally pause GeoTracker if I'm not shooting (sunbathing, swimming, sleeping, eating, etc.) but I could just as easily stop it, save and start a new log when I move again.
- When I've finished shooting, stop GeoTracker and save the log file. There are options to export it to external storage or various on-line services but you can always do that later if you have no Internet connection.
- Export the log files as GPX format files as those seem to work best with most of the tools I use.
- Upload RAW images and associated GPX file(s) to the PC.
- Run ExifToolGUI and, selecting all of the RAW files, run the option to set the lens info details from the MakerNote tag.
- Run GeoSetter and, selecting all of the RAW files, use the option to synchronise with GPS data files to set the GPS data information in each photo. This also handles time offsets, multiple data files, etc.