On March 15th, 2013, as part of a cruise, my wife and I are scheduled to take an excursion to see the GW of Hangyaguan. From my review of the postings, it seems that the consensus is to visit the Mutianyu or Badaling GWs. Can I get some feedback from those who might be in the know vis-a-vis Hangyaguan visit? I believe that trek to visit Hangyaguan from Tianjin is about 2.5 hours one-way. We'll be staying at the Hilton Beijing Wangfujing for 2 nights; so, we could opt to take a tour of either Mutianyu pr Balaling instead of Hangyaguan. Thanks for whatever advice you might suggest.