What have you done in the past for your anniversary ? If you have always done just a card then stick to that. If he use to take you out for a wonderful dinner do a card and bake his fav dessert. (less then the dinner but more then a card) I think this would show that it means something to you but you did not rely on him showing it meant something to him (him taking you out to dinner).
Are you two speaking via phone calls or email right now while he is gone? If so what tone are they taking ?
I am glad you are getting lots of mommie time right now. Important for both your D and S but think it is really good for you and S.
Your dreams are just your subconsious talking. With your H being away being so detached when he is there you probably have a fear barried within you that he will find someone else to take comfort in. Or maybe a small perjection of guilt or maybe a worry that your H is thinking with him gone so long you may stray who knows. Stay focused on your awake time. And enjoy your peace that you have right now. A little may have to go along way or you and your H may relax enough durring your time apart that you will be more calm when he returns from his job and be able to relate to each other better with out all the built up tension. I can tell by your post you are in a much calmer place. Try to stay there on the weekends when he is home.