Join Date: Jan 2013
Location: North Florida
Bikes: Specialized Sequoia, Jamis Aurora Elite, Diamondback Response mtn bike
On recent minitour, I was navigating 100% by Googlemap on my phone as an experiment (no paper maps). I got routed onto dirt roads a few times and once I couldn't efficiently divert to another path. I was very glad I was riding 32 mm tires than came on my touring bike. I had considered putting on some 28s. The 32s still had some trouble but 25 and dirt roads that aren't well-packed = bad situation.
So I suppose it wouldn't cause me to go to 45s if I planned to do all paved touring just for the odd chance, but for me 32s are a good compromise.
P.s. Coincidentally I have looked into Skyline Drive as an option for a ride myself sometime. Love the area.