Initially if you do online check in you can do one per room. But when you arrive you can have guest services assign different cards to different bands. Just double check after the first day or so - sometimes they do it wrong. We did this with my mom and my father In law when they traveled with my family and we stayed in a suite. When we arrived we had my mother link get credit card to her band and my father in law linked his card to his band. We went a few days in the park, and then asked guest services for a print out to see what we had spent. My father in laws purchases were perfectly done and charged to his card, but my mothers were on our card. We just showed them the error and they fixed it. All her purchased were shown as being on her specific band, so they reassigned the band to her credit card again and moved over her purchases to her card. It worked correctly after that.