If the convention package is available through Walt Disney Travel Company as a commissionable offering, then DISavers can handle the reservation.
DISavers can handle the room-only component if you wish to get your convention admission media separate from the room. DISavers cannot offer any of the convention admission media as a separate item.
If the package is an exclusive program NOT available through WDTC, then DISavers can't assist with the reservation. In the case of the Disneyana Convention, it is an exclusive convention package and is NOT offered thru WDTC...and thus is not available thru DISavers.
DISavers would need to check on the specifics of any convention package before being able to properly respond.