Brand new & young family need some ideas

Hello all this will be a first time for the family and I want to surprise them with our first own vacation just us 4. I'm going to rent an rv and we're going to head out from Tampa, Florida. I plan on doing a 8-10 day vacation on the road and completely open to going anywhere. Me and the wife just want to get out of town and go somewhere. Was thinking Grand Canyon but probably to far to enjoy the road trip and we have a baby so no white water rafting. Thinking possibly Tennessee smoky mountains blue ridge mountains. Like to see some small towns possibly and just enjoy the sights and see new things. So if there's some routes done by anybody out there and anybody that knows of places that are a Must See please tell me all about it. Thank You