I personally think its a lose - lose situation no matter what he does.
If he does meet with her again (I may be wrong but I thought I had read that they already had met) then he is going to come off as weak and if he doesnt then he looks uncaring I think he should stick to what ever plan he has used for the last few years and at least look consistent because he cant win the popularity stakes on this one.
As for Cindy Sheehan it is understandable that she isnt happy but I am not entirely sure that what she is doing is in the best interests of anyone, her son included.
We are more often treacherous through weakness than through calculation. ~Francois De La Rochefoucauld