I would suggest that you make a decision based on how you like to travel. If your family prefers shorter drives, then by all means, stop along the way. This is not unusual, as many of our RVing friends from New England stop at motels along the way to Florida in winter. No need to put up with a cold rig.
When we travel the mountain route from W. PA to the Fort, we generally overnight in the Fort Mill KOA in SC, just over the line from Charlotte. We drive 9 hours the next day, and make the Fort at dinner time. A quick trip to Trail's End for a pizza completes the trip down.
So, tr