I just found this and it was beautiful to read. I am sorry that he was not able to be with you but I know he was in your heart and glad Disney made it that much more special.
My DH was in the Army, and while he intended on being in for life, he had to get out early (he is a party disabled Vet of the Gulf War). I truly appreciate your sacrafice and that of your husband, I know if circumstances were different, I would be in your shoes now. We kind of "lucked out" if you will, our biggest milestone, the birth of our first daughter, he almost missed but in the end was lucky enough to be there for it. His unit deployed to Bosnia, I, 9 month pregnant, said my goodbye and off he went. I went home and cried and cried, scared for him, sad he would miss her being born, and scared to death to go through it alone. A couple hours later, he came home. I was stunned. The general decided he needed someone to stay back and work on the computers (my DH's specialty). He chose DH, to stay back and work with him for a few days. I was already past my due date, so I was thinking I'd be ok, have the baby soon and he wouldn't miss it. In the few days, no baby, I was getting nervous. I asked to be induced, they said yes, when I reached a month past my due date. DH would never have asked to stay longer (he felt he needed to be whereever the general told him to be), but the general said he needed to stay and work with him until the baby was delivered safely, (I don't know how we lucked out to get such a blessing, but what an amazing gift.) He was thinking it would be hours or a couple days maybe. I held onto my DD for a full extra month. She was born exactly a month after he due date. They would joke that I was going to hold onto the baby till the confict was over to keep DH home, though the truth is I knew he wanted to get with his unit, you know, that torn feeling. Anyway, I had DD, we almost lost her during the delivery, it was a terrifying experience and I am so incredibly greatful that I was not alone for it, which I would have been. He stayed a few days as I had a c-section (over 10 lb baby) and then was off to join his unit. I am so fortunate and greatful to that general for keeping DH behind and so greatful that he had the added skill that the general needed. It was a very difficult time and I would have been a mess to have to do it alone. I give credit to all the women who do it, especially those who did it alone (no family) as I would ahve had to. It sounds like you are blessed to have a great family, and I hope that helps you even though it would be easier not to ahve to go through this.
God bless your family, his service and your service is greatly appreciated. Wishing your husband a safe return and a magical R&R break...