THANKS everyone! I appreciate the answers, experience and suggestions.
Heres the update: We live on the SE coast of Florida and for years before RV’ing drove to NC mountains. So we did that again, while home low temps were around 75, the NC mountains were around 55! So that worked out.
Thank you for the mountain driving tips, we have the 3000 Allison and going up gave me a chance to learn it. Florida being mostly flat and all.
Had a great trip, toured Savannah on the way up which was not too hot, stayed at a great campground/horse farm/wedding destination. And a remote lake at Lake Greenwood.
Thank you all!