Steve, I am sorry to hear about your knee. Concentrate on making the trip next year and how much fun you will have walking around all of the sites pain free. Let that be your long term goal. Take it one day at a time and it will be in the past quickly. Look at everything as a hoop you have to go through. Get through one and focus on the next one. Check each one off of your list as you go. I wish you the best in your journey. I will be thinking of you.