My friend on a bicycle tour used his smart phone GPS like you would in a car. Most of the time it was not used, and remained in his bag, he knew where he was and where he was going.

However when he decided to find a new route or address, it went on his bars so he could look, see and hear directions.

I had questioned the need for GPS up to this point, But when I saw the flexibility with witch he could safely take the road less travled, I knew I must have one for my next tour.