I'm afraid no one can give you an accurate weather forecast for some time in November. Nowhere is immune from the possibility of seeing winter storms. If you can leave things open to change, you will be best of deciding just prior to leaving, if that is your only concern.
With an abundance of time you really shouldn't have to worry too much if you keep updated with weather and travel conditions. Interstates are a priority to keep clear and traffic on the move and in the event of a storm you can simply pull off the road for a few hours, or for the night and relax while the road crews do their job and the storm passes.
The options of I80, I70 [or a combination of both] or 140 has little difference in time over such a distance, so if your goal is to get there and there is nothing you are bothered about seeing in particular, decide when you have the most up to date info available. Allow a minimum of 5 days and keep a couple spare for delays.
Having said that, is there anything in particular you might be interested in seeing along the way ? You will find Lot's of ideas searching through the forums and in the green tool bar above. The Map centre for instance is a place you can create routes and find lot's of interesting attractions along the way. Once you get into more specifics we can help out some more, but a list of interesting places across almost the entire US would run into tens of thousands of options. As for surprises along the way, well there won't be a shortage if you look around and speak to the Local's, but if we told you [or they were listed on the Internet] they wouldn't be a surprise ! ;-)