The 305 is not a mapping GPS and hence a poor substitute for a tip sheet. All you will really see is the track and no map. It would be very difficult to know exactly where to turn with no visual clues other than the track cahnging direction.

You should invest in one of the mapping GPS devices. They are excellent for following a route. The only problem is the tracks downloaded from places like mapmyride would like the visual and audio cues before each turn.