Hi Shelbel -
I was in the 18-month accelerated program. graduated in Dec 2006. I got engaged in Feb 2005, and had planned to get married in August 2005. When I was accepted to school, I learned that we had competency assessments the Monday after my planned wedding date - not the best scenario. So we delayed the wedding for the following August. Because we had a few weeks off from classes, it worked. However, I had already done a lot of planning prior to my getting accepted to school, my mom was able to help out a lot. We also decided to really tone the wedding down, just to keep it simple. Actually, the planning that I did do during school was a nice distraction for me. So, this really worked for me.
If you are aiming for a large elaborate wedding, I wouldn't advise trying to do it during the program. But, don't underestimate the need for distraction from school - so maybe planning a wedding would be a fun, non-school-related activity. (You will need these, I promise!)