Upload & Sell: Off
Largest pano I ever did was 147 vertical frames (yes, 147, it was 300,000 pixels wide, did it as an exercise to see if my computer was up for the challenge). It took me about 1 minute to take all the shots. I didn't worry about cloud movement because the adjacent frames in the pano would be close enough to not matter. If I was doing a 360 degree pano, that would certainly be something to worry about, but in a pano like this, not really an issue (at least for me).