The park is open during the weekends of November, but if you want to maximize the time you have at Six Flags, the park is open longer the weekend after Labor Day. The weekend after that, though, the park is only open on Sunday due to a private event. In terms of crowdedness, I wouldn't expect it to be too crazy.
If you decide to go in November, the park will be open on the weekends. Weather wise, it shouldn't be too cold yet. Ride wise, I'm not sure if GASM, Superman, Blue Hawk, SkyScreamer or JLB4M will be open since they close the back of the park for maintenance. Crowd wise, it won't be crowded. People don't realize the park is even open half the time.
If you want to know anything else, let me know. If you want to meet up, grab a beer, and get some rides in, I live roughly 20 minutes from the park, and it'd be great to meet up with some TPR people.