A question regarding connecting/adjoining rooms. Have two rooms booked next week for four nights each. One a comped MGM room, and the second an award Marriott room. Looking to have adjoining rooms. The MGM reservation agent said she could not “touch a Marriott reservation” to enter the request. Suggested I just handle it when checking in. My fear is that we will be arriving in the evening, and adjoining rooms may not be available. Anyone done this successfully before?