If you know of anyone who is coming to the wedding but has not yet booked their room, be advised that both the Port Orleans Riverside and the Pop Century are booked up. They can call Disney (weekly or daily) to see if there are any cancelations.
They can also try any non-Disney site, such as Expedia to see if they have any rooms available at either Port Orleans Riverside or Pop Century. Sometimes these sites have blocks of rooms to sell.