In reply to Marek:
Your way point issue isn't a problem on a Garmin.
It simply tells you what to do as you approach a junction etc. The only time it struggles is the same as a normal Satnav - when the map has the right of way at a T junction wrong.
To the OP... it sounds like you are trying to use the Navigate to function on the Garmin? Better to pre-plan your route via BikeHike, Garmin Communicator or similar sofware before you go. There is a function to preview your route if you are selecting a pre-planned route then one of the options shows you the map (which you can zoom and Pan into)