Both the Camino Francés and the Voie du Puy are much less demanding than the Dolomites, although both have stretches which some find a real challenge. The Camino del Norte, particularly when linked to the Camino Primitivo, is closer to the Dolomites in the physical demands upon pilgrims, especially those with a limited time scale. You will have not trouble finding private rooms on the Francés and Le Puy, but occasional difficulties on the Norte and Primitivo, in which an albergue is sometimes the only option, unless you are prepared to cover perhaps 40 km/24 miles in a day; this is rarely necessary, however. The reverse is true on other lesser known Caminos, such as the Olvidado, where the lack in pilgrim accommodation in some places necessitates the use of private rooms in hotels, B & Bs etc. (These are usually reasonably priced.) If you want a fairly demanding Camino, then the Olvidado would be a good choice. Buen Camino, whichever you choose!