We always have the confirmation information printed out just in case there's a mix-up. As far as whether CMs ask for your information, we've had varying experiences. Last month, the CM at EPCOT asked for the name on the reservation for Akershus as we lined up for the early ADR line. He had a list of reservations, found my name and checked it off with a highlighter. At MK the next day for CP, the CM just directed us to the early ADR line when we told him we had a reservation - no list, no confirmation.