Martha's Vineyard is know for their "Fools Clouds", that blanket the landing strip making it essential that pilots know and use their instrument panel / not visual sighting.
Also, Jr had a cast on his ankle and Flight logs do not normally give clearance for flight in that condition, as you need the foot pedals for steering. A cast is a heavy dead weight-would be difficult to fly - not impossible, a heavier task.

with out context, i had no idea what i was looking at. with vk time stamp it is pretty clear, foggy but clear.