Hello! I've finally fixed a date to my walk and will be starting my Camino in SJPDP on 19th Sept. I would be taking my time with the walk to Santiago and possibly to Finisterre. With some buffer time factored in, I'll be walking from Sept till early Nov. As such, I'm wondering if trekking/walking poles would be useful. And if I should bring a sleeping bag along? Or would a sleeping bag liner be suffice? Thanks in advance!