You definitely want Old Time Christmas. The after-7 free is not running during Pumpkin Fest, but it will be again for Christmas. Just keep in mind that SDC is very strict on operating temperatures for the coasters, so you want to go while it stays above 45°F. They start closing rides at 42°, and that's as measured at the top of the lift, so as long as ground temp is 45° or more, you're all right.
Fri-Sat will give you the most time in the park on a one day ticket. For example, you could go on Fri Nov. 8 from 7 to 9 and on Sat Nov. 9 from 11 to 9:30. It'll be busy, but ride queues may not be too bad depending on weather. If the high is in the 50s, smooth sailing. If it's 70 or so, I'd recommend Trailblazer Pass.