Just in the very beginning stages of planning. I know this will look rushed to those who like cities and those who like to linger. We prefer to tour enroute each day and one night stays suit us fine. With that in mind...how feasible is this itinerary?
Fly into Madrid
Madrid 2 nights
pick up car
Toledo 1 night or do as a day trip from Madrid and add a night there
Segovia 1 night via El Escorial and Avila
Burgos 1 night
Bilbao 1 night just for the Guggenheim
Santillana del Mar 1 night
Comillas 1 night visit Altamira/ElCastillo caves
Potes 1 night telerifico in Picos de Europa Park
Oviedo 1 night
Santiago de Compostela 1 night
return car in Vigo/take public transit to Porto Portugal
Porto 1 night possibly 2 if we do a boat or train for Duoro instead of the car
pick up car and follow RS Heart of Portugal Tour Itinerary in reverse
I admit this looks busy (even to me) but in some of the places I am only interested in seeing one major landmark or sight. The little I know about Northern Spain I have gleaned from just a couple days of searching the RS forum and studying tourist websites. I will get a guidebook and do in depth research, but for now I am just trying to feel out how many days I need on the ground before making flight reservations. I will likely need to leave some things for a future trip. Thanks in advance for your input.