Coming in from the North still doesn't help you out for a couple of loop back curves between Pigeon Forge and Townsend...
I have never taken the US411 exit off of I40 to Sevierville. I don't think there is any hard curves in it... There was always something funny about US411 on getting on/off of I40... We usually come in from I81 from here in Northern Neck VA.
We always use the I40 Exit 407 at the 66 road and is the best way for us to go thru Seiverville and pick up 441 in Pigeon Forge. Then you will want to take the US321/73 road to head for Townsend. This will be a good road until you get to Wears Valley where you will find at least one loop back. Might be two in the same area before you run into Townsend. Its doable but is a real honest loop back. Might want to check your close in maps to see if you OK with it.
The only other solution is to go through Knoxville on I40 and then take I75 to Lenoir City exit which is US321 and come up through Marysville to Townsend... ALl good trailer roads going that way for sure...
We always camp at ELKMONT inside the Natl Park with NO HOOKS on our trips and use Townsend as our base town for shopping and supplies... Might make a run down throough Pigeon Forge and Gatling and do some shops... I always go to the COLEMAN STORE in Pigeon Forge to see whats new in the camping world...
Penty of great places just before you get to the Natl Park for HOOKUP sites to camp...
Be sure to do the CADE's COVE run inside the NATL Park at dusk to cath all of the wildlife out that way...
I may have lost track of time but it may be near the season where the Synchronous fireflies that live in the NATL PARK at ELKMONT CAmp is doing their thing. That area fills up big time and even road closures for this event.. It may have happened already as I recall its late May Early June for the national event...
Roy Ken