We just engaged (last week) a Trust Attorney for all our assets to go into a revocable trust (I believe ) including the DVC contracts. While our DS is on the one larger contract, the attorney is arranging the trust so that when everything is passed on to our son and he eventually get married, all assets will be untouchable by any future spouse in a divorce proceeding.
We put in a quit claim deed to put him on the contract two years ago when he turned 21 and Disney no longer recognized him as family (stinks!) since he then had a separate address for his first job. The quit claim deed cost me about $60 and was filed with the county. You could get the QC Deed at any Staples, call the county and they will tell you what papers to provide, give you the cost and where to mail to. A copy was then sent to DVC Administration. Was simple and cheap.