Rilo, we go every late November, and generally stay either in Ypres or Arras. This year in fact we have a night in each, as we continue our year of travel indulgence! My grandfather was enlisted in early 1918 at the age of 16, but after training luckily didn't reach the front until late spring early summer. This meant he missed the German spring offensive, and hence there was more of a chance of me and my lot being here. He was involved in the Battle of the Peaks of Flanders around Ypres, (although he called it Wipers), in late September 1918, by which point the Germans were starting to crumble. The young boy from a tiny village in the Fens was very proud of his part in that significant advance.
Oh, and by the way, BA are doing flights next year, check it out.