Yes, as long as it is valid the day of check in.. I have been renewing my AP for June 2nd. I have been checking in end of May. My pass is valid at check in.. like I said I renew while there, but they have never asked me to show renewed pass. I think it is like the same deal as far as booking end of a season & getting that rate the remainder of your stay.. ie: book value rate check in day 1, rate goes to peak day 2..you stay at value rate... same with AP rates...