Nice going! I hope you enjoy your stay! I've won auctions from skyauction, and was given certificates to turn in as payment. All the reservations were already made for me, by skyauction, for the dates I requested. I too confirmed with the resort, just to make sure, and everything was in order. And I was even sent brochures and a confirmation letter from the resort, just as if I had made the reservation myself. Depending on the place, I don't even think they know if you purchased from skyauction or not. I have heard a lot of good things about skyauction.
Also, I won an auction once, and the dates that I requested (I gave several different weeks for travel) could not be honored by the resort, so my money was refunded to me by skyauction.