We (4 of us) are going to be at the Boardwalk in Aug. for a week with the DDP. Our oldest daughter will be staying with friends at their house while we are there. She will be joining us for some meals (maybe 3) so we were wondering how that works with the DDP. Can we pay cash for her? Not sure if this is a problem. One of her friends may join us also. Hopefully someone can answer. Thanks