We just had friends visit us in the Sevierville TN. area from the Flint MI. area, no kids but they have 2 dogs. They left at 6am and did not arrive here until 9:30pm. They pulled their 30ft. TT. How fast do you drive? To make it to Chattanooga from Knoxville is still another 2 hrs. about, maybe a tad under. That's a very long day driving, especially with 3 young'uns. To each his own and I know you want to get there.....in one piece, Its inky dark in southern KY and Northern TN so be very careful and watch out for deer. Good luck and safe travels.