I did it last summer, and it worked fine. I had 5 nights on one contract, 2 nights cash, and 5 nights on a different contract. I made the cash ressies with CRO, and told her to link it with the other two ressies. Then I called MS and also linked all ressies. When I checked into BWV, I told them that I had 3 ressies, which they already knew because they saw all the linked ressies. I never even had to go to the desk again--when I changed over to cash, they automatically billed Am EX for charges to my room, and used the same # for the cash nights, and put a bill and new keys under my door before 7 am. I went to the desk but they had it already done, and had the last part of the ressie (the second contract) flagged. No problem at all.
I can't stress enough, however, that it's your job to make sure everything is linked thru BOTH CRO and MS. This also means that you are slotted into a room before everyone else, which could be positive or negative. While this is not guaranteed, I have done it 3 times per year since 1997, and I never had to move yet! In the fall, AP rates are about 1/2 price for the 2 bedroom, but they go fast, and you can't book until about 60 days ahead (Iheard a rumor that it's now 90 days ahead, but I don't know if that's true). The 2 bedroom will be about $340 plus tax, sometimes less. I got a 2 bedroom last year for $266, but that's unusual.
TIA
