I`m taking my old camper van down to Grenada to help friends with their olive harvest from November to January. Two questions for travelling Arrssers- What is the best route through Spain to Grenada from Biarritz end of Pyranees. We plan to go along north coast a bit them drop straight down via Madrid, is this the best route? Sierra Nevada is far higher than Highlands and Lake District where I am an experienced walker. What are the winter conditions like there for walking, camping high? Thanks for any advice. Harry.