Hello Pastrychefarmywife,
I am sorry to hear about your husband. My husband has made 2 trips to Iraq both for 15 month. He got diagnosed with PTSD when he got out and has currently counseling at the VA center.
I just recently had to admit to myself that what I tell him and what his counsel tells him are 2 different stories, even though we say the exact same thing.
My husband only takes advice from ppl who went through the same things he went through (like his friends and his council) not from civilians, because we dont understand (in his opinion). Even though my husband is in counseling he still has long ways to go. Because even though he knows he has PTSD doesnt make him accept it. Its a weakness and Infantry Men (evn though he is an "Ex" now) dont have no weaknesses.
As for the boxes. I can give you the advice to start unpacking and to ask him politely if he could help you with one box and than the next. It works for me and I hope it works for you as well.

Good luck