Doesn't Hilton have a CC that depending on the amount of your annual charges can net you their top elite level, Diamond I think it is? If so and if you can charge enough, it might be worth looking into staying at Marriott's for work to get Marriott elite status, and use the Hilton's "special" CC to get their Diamond elite level. This way you have elite status with both programs and points in both programs.

Your business stays may be a little nicer at Marriotts and your vacations will be a little nicer at Hiltons.