so my wedding is 10/20/12 in south bend, IN and as i found out a little bit ago theres a notre dame football game the same day. i reserved a block of hotel rooms for my guests (i could only get 15 rooms) but i was wondering if on the invitations i should warn my guests about booking the hotel early because of the game? also should i tell them to book the blocked rooms by sept. 20th which is their "due date". i really dont want to come off as pushy but im worried some of the guests will try to book the rooms last minute and find that all the rooms have been booked and be stuck. i just don't know what to do...should i give them a friendly reminder? TIA!