Ent rates at HoJo get snapped up quickly, so it's important to call as soon as you can on them. You could still make the reservations there, and get the 15% off Disboards discount, and then watch to see if they open up those dates again. Then you would just call and ask for the discount, and they'd change your reservation to reflect the reduction in cost. There's a good chance that they will add dates as it gets closer, and if they don't, you can always cancel (what is it, 48 hours in advance?) and go with your cheaper reservation.