We will be staying onsite (w/free dining) and I was thinking about just using our KTTW card to charge things instead of using cash. I've read that you can use the KTTW to charge your tips at restaurants back to the room. How does that work? The server we pay won't actually have access to our credit card, only our KTTW card, right? We never pay for our meals by credit card because my husband doesn't want the card to be out of his sight (too many stories about cc numbers being stolen). I told him we could just pay with our KTTW card and he was ok with that. My second question is the amount we charge on the KTTW charged to our credit card right away, or do they do it all at check out? Is it possible to write a check to cover the amount instead of it being charged to our credit card? I'd rather just pay for it and not have to get a credit card bill after our vacation. I just thought it would be simplier to use the KTTW instead of carrying around cash.