I always feel longing for a cooling, relaxing footbath at the end of 25-30 km stage
Unfortunately in my case it usually means paying 30-40 euro for a private room with a bathtub, and I can't do it too often, maybe once a week!
Talking about the foot comfort, on my first Camino, I also had a luxury item that surprised everyone who saw it. Since you are from Norway, you may know what it is, as it was probably invented in Scandinavia:
The weight of this is just 180g, you leave it in your shoes for the night, and even if they were soaking wet in the evening, in the morning they are
bone dry and sooooo warm! It is such a great feeling in the morning to walk in the shoes that actually warm your feet! And I am sure it helps to prevent blisters too. I did that Camino in April, it was raining often and pilgrims had hard time drying their shoes and boots in the cold albergues. I was very happy I had this gadget with me. As you see, sometimes a Camino freshman can come up with a good idea. And I couldn't ask for advice on the internet forums, because at that time there were no forums yet
Buen Camino, peregrino!