Crowe,
If your friends are near Fordoun, then Insch is MILES from there (if memory serves, probably 90 minutes by car). Insch is a super field by Cub or equivalent (well done Woody), but not so great after long haul in a PA28. It can also be a bit tricky to find!
Aberdeen will treat you fine as long as you don't arrive at the wrong time. You should have a good look at the arrival/departure routes as well...
Enjoy the trip, I wish I was doing it. Ah nostalgia...