I see the need for the signs - but worded to NOT imply this has to be done at all times. eg "If you have not checked Tain Range status." Some people trail in and assemble trikes, and never get near the runway ends, so the apron is a good location. My point was to answer the suggestion the notice was a Highland Council condition of using the airfield.
I did 2 touch and goes there on 23/11. I have a landing card for Dornoch. I didn't phone, but I had checked the NOTAMs on my Android. I used Safetycom.
The UAVs might not be the MOD - there have been a few UAV notifications in the Highland Region lately