We are using a TA, but did not have to block rooms. She used something called group-ease with Apple vacations. When we booked our trip and paid the deposit she got a PIN number that she can apply to each reservation that gives a discount. We also get a free room for each 6 rooms booked, I believe ( I think that may be thru the resort, not Apple) We only had to put a deposit down on our room. Guests book and put their own deposit down and have until Sept. 1, 2014 to make payments. I didn't want to put out the money for guest rooms....I figure that if they really want to go they have a year to make payments!