Not the end of May, but for early May we had an AP discount at Pop for $79 a night standard room. Not sure if there were GP rates last spring. Wasn't a big savings, but what I have come to expect. Usually about $15 off during regular season for value resorts. Not sure, but Memorial Day weekend may have had some blackouts last year. Try the history on mousesavers to see past rates and dates.
From what I remember of 07, we were going from June 4-10 and I know I had just missed out on an AP discount. I checked mousesavers and it looks like there was a GP package code and Visa pkg code, just not sure what the savings were.
$79 at POP, let's see i am paying $98 and $107(2 nights) plus tax for POP May 08. But I need 2 rooms so I am hoping for a code to upgrade to my fav Poly.