There's obviously other problems in their marriage that had occur before her trip in Oct 2005 for them to finally separate just a month later in Nov 2005. He probably did want to accompany her, not because he didn't believe in the cause, but because of their problems in their marriage. He seems to me a very private person and she seems to like being on spot light, so to him dealing with their problems in public is not something he wants to do nor pretend that everything is AOK when it's not, which is probably why he opted out, IMO.