Medora, ND to Florida panhandle

Your help got us up here. Now I need help getting back home. We leave Medora tomorrow heading for Pensacola, Florida. Finally have Internet again, so I can research current road conditions. We have come to prefer good secondary roads over interstates because we like to keep our speed between 62 & 65. (Retirement and getting older make you slow things down.) :) Some interstate is fine, just prefer to not do that all the way.
Any, and all, advice greatly appreciated. And if there's a "don't miss seeing" along your suggested route, please mention it. Thanks in advance.
Safe travels.