I'm looking into using skyauction for hotels. If it states the dates as "now thru May20" for example, do I need to be flexible with my dates? I saw the surcharge for high season (which mine would be). If I win the bid, could I be blocked out of the date I need and forced to choose a new date? If that's the case I can't use skyauction this time around, because my dates are inflexable, but there looks like some nice deals for the future me.