The best roads around Boone (IMHO) in order of preference...
* Rt. 181(look on the map NW of Morganton) - 10 of 10
* Rt. 421 from Holston Valley to Mountain City - 9.25 of 10
* Rt. 88 from Trade to Warrensville - 9 of 10
* Rt. 221 from Banner Elk to Grandfather Mountain 8.75 of 10
* Rt. 194 from Elk Park to Vilas 8 of 10
* The BRP from Boone south 7 of 10
If you want to explore some nice gravel roads, check out Blowing Rock to Globe to Mortimer to Rt. 181.
No matter how tempting 321 looks on a map, avoid it, especially on a weekend. Heavy TRAFFIC!