You started by telling us that you are scared of making this trip and open spaces, and now you're telling us you have driven a homicidal 1200 miles in a single day.

Clearly you're going do to what you're going to do, safety isn't something you're going to consider, and you seem to have all the answers (including some inaccurate ideas about October weather), so I'm not sure what you are looking for from this forum, other than the words, good luck and best wishes.