Here is what I think...get married...delay the honeymoon for now.
The reason I dont think delaying the wedding is a good idea is because you've already rescheduled it and put it off for December. Dont move it any further up.
Have the wedding and use your next break from school for your honeymoon...you'll keep your sanity this way.
You know I was in a similar predicament once too, and I also suggested the same to hubby that we can stay home for that time and put off the honeymoon til later
but later came and times were not good, so it wouldn't've been possible for us to go on a honeymoon. After a certain time, that trip you take isn't a honeymoon, its just a trip. it can still be lovely but its not hte same trip you take as newlyweds right after your wedding. I think if you have the hcance to go somewhere, wherever, go, because later might not be a good time.
Now that I look back, I really wish that I had taken the semester off after my wedding to relax, only because I had some more semesters left to graduate. We didn't live together right away. More so I didn't do very well in my classes b/c I just couldn't focus, I was in lala land over the wedding, missing hubby like crazy, not getting along wiht my family etc. It was a sucky time.
Miami, if you have just one semester to go and there's no way that you can not finish, i'd say get married in those two weeks, but if you have still a while to go... just get married and skip a semester. Everyone will tell you that its harder/not possible etc, but if you are truly determined, you will graduate and do what you want to do. From the way you have described your fiance/inlaws in the past, they don't seem like the type that will stop you from getting your education. If, however, you decide to take diffrent paths, that's okay--you shouldn't feel guilty abou t it. I'm probably going way too far into the future, but I'm telling you what i adivse based on past expereince. :) Good luck :)