I agree with domigee that the terrain is varied. There are some rocky downhill sections, like coming into Campobecerros where you will be happy to have boots and poles.
In general, the terrain becomes more attractive after you pass into Galicia.
A friend and I walked the VdlP last September / October, passing through Salamanca about September 28. It started to get very cold, in the mornings only for the most part, when we left Asturianos - it became a high priority to find warm headcovers and gloves.
In general, you should not have problem getting a bed, and usually even a blanket if you need it. We did have some bad luck / competition for beds from Tábara to Asturianos because we were competing with a group of approximately 18 who were supported by at least one car and trailer who would beat us to the albergues. We were always able to find some type of alternative (hostel or floor).
You might find the elevation profiles in a single file useful (if you are taking a smartphone or tablet, take this and other info):
https://www.caminodesantiago.me/com...aps-with-elevation-profiles-in-one-pdf.33382/
I used the free (on Android anyway, not sure about iOS) Maps.me App Offline Maps and path information from:
http://www.elcaminosantiago.com/Camino-Santiago-Maps.htm
Thanks for the information. I was not planning to take a smartphone or tablet. Will I never be heard from again if I don't? How many nights did you sleep on a floor?
I was very happy that I had the maps available and could tell where I was. The paths were not completely up-to-date because of some changes since they were created but still were very useful (sometimes just being sure we were leaving town correctly).
I also made some detailed comments at this post which might be of interest:
https://www.caminodesantiago.me/community/threads/general-advice.38152/#post-373993
Buen Camino!