"Is it possible to redeem reward points for an all inclusive package?"
Marriott's ESCAPE! Inclusive packages are based on a paid rate with a 4 to 5 night minimum and vary by participating resort - which are limited to locations in the Caribbean.
I'm not sure, but my hunch is that the package is inclusive of accomodations. For more information, click on the property links at the Escape website (right side) or call 1-888-PARADISE and ask about promotion code NCL