I am getting married there in May 2009 and I have found that you can do a variety of different options that can be really expensive or next to nothing. The major costs are the open bar and private dinner reception - but you don't have to do them. Many people do the free dinner and book a reception for only $300, which is reasonable.
Also, I had no problem getting the free wedding package as mentioned before. It took about 2 days for me to sumbit my group and have a canfirmation e-mail back from MC.
As others have mentioned, check out the facebook group "Majestic Colonial Brides" for lots more info!