Welcome, very nice rig. I have about the same mileage on my 2001 as you have on the 99. I would think changing the fluids on the rig, such as radiator fluid, transmission oil, differential oil would be a good idea.
How did you like the Titan. Was the interior cheap looking or really well done, like the 4Runner? What was the mileage on that monster truck, 13 MPG or so? I hear so many different stories about that truck, some good, some bad.
By the way I go by Maryville 2 or 3 times a year when I visit the Smokey Mountains, all I know is that I take 411 to Maryville and take a right towards Townsend. Nice area, I belive they have a nice private College there, it has a reputation of being a good school, exspensive though. We have been looking into schools for our Son.