I'm not sure if I have been on Davis Cr/Beaver Dam Rd. I usually come in from the south on Smithfield Rd off of 68. Smithfield is a good long ride. It's graded gravel all the way. The last time I rode it the gravel wasn't very deep. I've ridden it two-up with my Wife and had no issues.
I have not ridden Rainbow Springs Rd yet, but it is on my list. I do have a loop in that area, but some of the roads in my route are closed.
I rode Tuni Gap back on 09, I think, it is a good road. It's a forest service road. Most of it was a very thin layer gravel with just dirt in some areas. There was one creek crossing when I road it, but it was raining that day and the creek crossing was only about 5" or 6" deep, so that may have been from the rain that day. Tuni Gap is a good ride from Hayesville over to Wayah Rd. The connecting road, Tusquittee Rd is a great scenic back road. If you like the road less traveled, you'll love Tusquittee Rd.
Would you be interested in a group ride along these roads? If so, I'll plan a route and we'll go check them out as a group.
2012 G-Strom - White