I will be driving through TN during a road trip, and I just wanted to know if it is practical to stop in the Smoky Mtns overnight. I have never been in the SMs, so I was unsure if it was an easy drive in and out of Gatlinburg from I40. Can it be done easily at night? My plan would be to arrive in the early evening, go for a hike in the early morning, and take off before noon. Thanks in advance!