Originally Posted by Jon Maiman

Not that it changes anything, but out of curiosity when did you book the room? Regardless, call the property and ask to speak to either the Front Desk Manager or the General Manager. Politely remind of them of your status including the guarantee if you're walked (Room Paid for by the Property, $100 Cash, and 90,000 points). Politely and firmly explain other accommodations in the area won't meet your requirements for attending the wedding. Be polite and firm. While it is unfortunate the hotel oversold rooms regardless of the reason as a titanium member you shouldn't be one of the guests inconvenienced by a walk. Good Luck.

--Jon

P.S. When traveling with my family, my risk tolerance is different. While what I stated above is %100 correct, there is still a risk you could get walked anyway. While it isn't right, if you can proactively find another accomodation on your own that is acceptable, you may want to negotiate with the property to still compensate you. Sometimes family harmony has to take precedence over other considerations. Only you can decide that for your situation.