Wish I had gotten to this earlier,
http://www.hotelplanner.com, would be an excellent place for someone to setup a event, and then they send it out to all the local hotels and they bid on our business for the lowest price. You just submit where, when, what you'd like to pay and how many rooms you'd like reserved. If the rooms aren't purchased by the cut off date they go back into the hotel's room pool at no extra charge. no harm no foul, not too late to still do it though.... Just a suggestion. i used it for my wedding and it was great.