Spain, where to stay ?

[Naggedhusband]

Just planning a trip for next year but not sure how to approach it. Been abroad travelling plenty of times before but not Spain. Easy to find overnight accomodation in most places without booking anything in advance but I'm not so sure about Spain.

How easy is it to tourl and just find a place to stay along the route each night ? Or is this difficult and would a base location be better and ride out from there each day ?

Done it both ways elsewhere but really not sure for Spain.

Any wise experienced Spanish tourers advice would be appreciated.