I have been happily using a Quest and Mapsource for years, to calculate my routes before uploading.
Adding "Via Points" to a pre-calculated route was easy, and you could add a personal waypoint or search for a town or junction.
This option does not seem to be available with Basecamp and a Nuvi. I can add a personal waypoint, but not a town or junction?
Am I missing an option somewhere ?
And as an aside, whilst on a journey, I took a detour from the Nuvi calculated route (still staying on mapped roads) and the Nuvi gave up! "Unable to calculate route" it said to me, one assumes in digital frustration! The Quests that I have used happily for years never gave up!