Hi Jim,
Haven´t been there recently. To plan a trip through the Alps, I strongly recommend the well known Denzel Alps Guide Book
Denzel-Verlag, Alpenstraßen, Alpenpässe, Motorrad-Touren, Wanderwege Now available in the 28th edition. The guide book contains numerous route descriptions, map sketches and route assessments according to difficulty. It is written in German, but maybe it helps you?
And you could check also the website
Alpenpässe, Schotterpisten und andere Ziele (nicht nur) für Motorradfahrer - Alpen-Motorrad-Guide for information about the passroads in general and also (current) information about possible roadblocks here
Wintersperre und Verkehrslage Alpenpässe - Alpen-Motorrad-Guide (it is in German language, but I guess, a translator will do it).
The Alps are really a beautiful place. Even if it is paved throughout today, I would also include the "Route des Grandes Alpes" (or at least parts of it). It really is one of the dream routes in Europe and offers wonderful mountain panoramas and fun on the curves. The route connects the region around Lake Geneva and the Côte d'Azur on about 700km and is thus also a great connection to the south or for the way home from the Alps to the north. The highest point, by the way, is the Col de l'Iseran (=highest drivable pass in the Alps) at 2,790m. As paper maps for this region I recommend the Michelin maps No. 523 and 527 in scale 1:200.000.
Probably you will often be above 2,000m and drive different, high-altitude passes. A continuous driving of the region is due to the altitude usually possible from about mid-June until October. In any case, you should be equipped for rapidly changing weather and varying temperatures.
Enjoy!
Björn