John
Sorry about that as it must be very frustrating for you. Fog can creep up on you quickly. Not a major problem unless you loose your engine, want to get back into your airfield or do not have much fuel on board.
Fog can be a problem. I can remember flying at night into a field which was not manned. The lights were put on for me for a night approach. Flying over the airfield in the pitch dark I could see the lights clearly and set up an approach to land. Still no problems and continued the approach to land.
Went to flare and all of a sudden the screen went white. Touched down stopped and taxied back hardly able to see the runway in 200 meter fog 10 foot thick
Pace