I plan on buying AP's this year for our trip in May.I am thinking about booking a studio for my parents to come(not enough points to book for them)and I saw there is a 45%AP discount.Since I will not be activating a voucher until we arrive could we book the room w/the discount if I had the voucher in hand and activated it there?Or do I actually have to have an activated AP in hand when I book the room to get the discount?? Thanks.