I hope I'm not too late to answer this for you. We were there in December and had the same question. You can purchase Front of the Line when you get to the parks. I don't believe there's a military discounted price for them though. I'd wait until you're in the park to see if you really need it. We didn't get them and were able to do everything we wanted to do and then do some of it an extra time or two with no problems. The longest waits were for Harry Potter things, but even those weren't too bad. Do a search online for touring plans. There are some really good ones out there that tell you where to go and when to eat down to the hour. We used one of those but modified it to our preferences and did well without feeling rushed.