Members may make reservations at their home resort 11 months prior to check out. They may make reservations at any other
DVC resort 7 months prior to check out. Since you are going in the summer, you can probably safely wait until 6 or 7 months to get a reservation - unless:
* you are going over the 4th of July or
* want to stay at the BCV (for access to SAB) or
* want to stay at the BWV in a standard view room or
* want to stay at the BWV in a guaranteed Boardwalk view room or
* want a Grand Villa (at any resort that has them).
For those, you are going to need the 11 month window and only someone who owns the resort you want will be able to help you. If you need the 11 month window, be prepared to pay a little more per point to secure the "harder to get" reservation.
If you haven't already, read all of the sticky threads at the top of the
Rent/Trade Forum.
Be sure you understand the owner's cancellation/change policy. They will vary between owners. Most owners consider renting to be a non-refundable transaction, but will allow you to reschedule. The ability to reschedule will be restricted by the status of the points the owner uses to make the reservation.
Feel free to ask any questions you may have here.
Best wishes -