Just got back from several days in the Banff area. I would highly recommend the drive from Banff up to Jasper. The Icefields are definitely worth a visit while the drive itself is also a very pretty drive. In Banff I would recommend the Gondola ride and the visit to the Cave & Basin springs site. Lake Louise is also very scenic. As far as Jasper, while I was only there for a short time it is not really much of a "town". If I had my preference I thought Banff was a much nicer town with restaurants and shops. Enjoy the trip it is beautiful.