Our long time member Tirademan (R.I.P. Scott McClean) compiled this extensive archive of Sasquatch related newspaper articles and donated it to the BFF before his passing. The earliest articles in this collection are from 1818 in Florida, 1877 (Australia), 1884 (Canada) and 1764 (Europe).
I favor the downwind side of the valley. There the air is going up. On the upwind side of the valley the air is spilling down into the valley. If the air is moving fast enough that down draft can exceed the ability of the airplane to climb out of it. At times you could just idle the motor and glide like you are flying a sailplane on the downwind side. Sailplane pilots know all of these tricks. They have used the air crossing the Sierra Nevada range to get to very high altitudes above 40,000 feet if I remember right. Should you need to turn around in the valley the downwind side gives you more room to make the turn. You physically have the same space but because of the air movement across the valley you have more flying room to make the turn.
^^^ I knew that a pilot would have input. When you fly through a valley, do you favor the middle or the sides? As a passenger in Grumman Goose flying in Alaska, I noticed a few things. Sometimes I sat up front by the pilot. They tended to fly close to the sides of valleys and at times , would lower the wingtip floats. Seemed odd to be flying by mountains, over snow, with the floats down. They were great pilots.
I am going to shoot a video of my SUV's cabin layout for car camping/ research. I will film this weekend and likely post next Sunday, don't have my 07 Vitara 4X4 up in the air yet ( money matters ) but it is in the plan.