I am going to be walking the Camino this summer from Le Puy and need some information about credentials. I am planning on camping quite alot because of the distance I want to travel in the time frame I have. I want to have my credentials stamped but I most likely will not be staying in the the refugios often, I think I am planning of staying on refugios 25 to 30 of the 50 days I will be walking. I want to know if they will stamp my credentials for free? Or to I have to pay for the stamp, even though I wont be staying the night. Also do other people along the route stamp the credentials besides refugios?