Nice easy airport. Practically deserted; commercial flights (used to be lots of Ryanair) ended 2-3 years ago. The main terminal is all locked up. The place looks like time has stood still for decades :) You visit the (C) door to see the police (if needed), then walk along to the fire station and pay the man in the hut, then walk back and exit through the GA gate, noting the number for returning. The big issue for non schengen traffic is 24hr PN or 48hr PN for weekend trips, for both arrival and departure. However this is becoming common in France, so the once-big UK business has almost disappeared. The town of St Malo is nice and scenic. Trip report and more pics here https://www.euroga.org/forums/trips-airports/13956-dinard-lfrd-28-5-22