You cant do it via the web, but call the Wyndham 800 number and ask for the "Costco Rate". It is fully cancellable, usually $10-$25 less than the AAA rate and quite often cheaper than the non-cancellable web rate. I guess you should really be a Costco member but I was asked for my card only 1 outta 7 times (and I do have one),
MisterNice