Hi , DVC owners do not get discounts through CRO only through MS . It is 25 % off rack rate IF AVAILABLE !!! It is not always available . You may also link the reservations together so you will not have to move rooms !
Do members get discounts on other resorts at WDW besides the DVC resorts????
I believe, but am not certain, that the member needs to be staying in the room as well (or at least present to say they are staying in the room) - so you can't use the discount for friends unless they are travelling with you.