Park ranger was telling us this weekend about a lady who rolled her trailer when GPS took her on some very narrow and winding county roads. Guys we were camping with asked how that could happen...I could see it happening very easily.
Roads around here are very narrow, like 9' lanes with a deep ditch that starts at the white line on the side. The TT has a high center of gravity, and those curbside wheels don't have to drop but a few inches and that rig will roll over like a puppy...and when it does, it's taking the truck with it.
Speed is the key...go SLOW when the road is narrow, even if it is dead flat and straight as an arrow like the IN county roads were on this weekend. If a semi or something comes the other way you need to be able to slow down or stop in time.