I too moved up here 13 years ago from south.
Rule No.1* gets you a long way with our access laws. Be respectful, don't wander through a working site, private garden or similar. Smile, wave, enjoy the freedom. I really don't give it much thought and frankly the few times I have had a discussion over access it is stalking season or when in a canoe. And it is a few times.
And the discussion, even on one occasion when I was very wrong (permission given to access in an emergency by vehicle was given - by the wrong estate for the wrong track - and so I zippily drove a Landrover through a stalk in progress....) it was still amicable and an apology saw us shake hands and move on.
*for the avoidance of doubt.
Rule No.1=
Don't.
Be.
A.
D*ck.