Update:
I started setting up at 8am. Temp was 48 degrees outside. At 8:30am, I turned on the crusher/destemmer. I turned it off at 9:15am. We were done cleaning up at 10am.
Here's the particulars:
Viognier: 780 pounds, Brix 24.3, pH 3.34
Marsanne: 280 pounds, Brix 24.1, pH 3.41...