ACCESS TO MARRIOTT RESORT FACILITIES, NOT STAYING AT RESORT

Good morning all -

Does anybody know if a Marriott timeshare / points owner is allowed into a resort property to use pool, etc, if staying someplace other than the resort? ( obviously close by ). Booking late, as usual, a timeslot wan't available at the Marriott resort of choice, so we booked into a different brand resort first, then on to the Marriott. We are Marriott Presidential / Titanium level ownership, if that has any extra pull. Thank you - RVD