Perhaps CRC members can use the Oasis Lounge? It's a NWA affiliated lounge (not a real WC but WC members have access). Under these gudielines will CRC members be allowed in? Most of the lounges at T4 are outside of security which is a pain.

As for check-in, I wonder where they will go. T4 Check-in is almost fully utilized in the evenings, unless they will use the NWA/KL check-in (they have about 10 desks IIRC - will this be enough for NW/KL plus DL to LAX?