You will have soooo much fun! DH and I just went in August (his first trip!) for our honeymoon, and we had such a wonderful time!
My best advice is to WEAR THE BUTTONS!!!! The CM's were incredible to us. They would announce us all over the parks when they saw our buttons (coming in at the bag check at MK, at the CS restaurant in Frontierland, getting on the train in Frontierland, at Kona Cafe for breakfast, too many to remember all of them!).
We were also given many CM only pins as well as a free dessert at Kona, and we were asked to be the first on the Safari in the morning. That made DH's entire trip!
They truly did bend over backwards for us. I would go again on our honeymoon in a heartbeat!
We made a point to stay in MK after Wishes while the park cleared out, and it was so neat to sit and watch as the park cleared out just the two of us. It gave us a chance to just relax and be together after a busy busy day.
We also ate our way around the world in Epcot. We made sure to try something in every country even if it was just a piece of candy. We had the most fun there eating, exploring the countries, trying on the hats and watching all of the people.
Also, don't be afraid to be goofy and just have fun! DH played the tambourine with a bunch of women in the Family Fun Day Parade at MK and I was the can-can dancer at HDDR. The whole trip we just did whatever we wanted without worry of looking silly. Why not? We were on our honeymoon, and we weren't going to ever see these people again!
I hope you have as much fun as we did! It is such a great place to go fora honeymoon! I told DH we have FAR better stories than our friends who drank their honeymoon away in Mexico!

AND we paid so much less!