Thanks for the suggestion.
I called but was told that because this is a reward stay, I cannot add my husband's name to the reservation. I even told the rep we are arriving at different times and ask if he could check in first, but again she said no for the same reason. He will have to wait for me to check in.
BTW - this is Renaissance Harbour View Hong Kong and indeed we are flying in at different times from separate cities. But the CSR wouldn't bend.