I just charged all the tips back to the room (set up the room charge with the reg Dis Visa though) on the night before we checked out I got a printout of my room charge total and just transferred the right amount onto the rewards card and then went and paid off the room charges. It worked out great that way. I was orginially going to carry the rewards card around but with all the confusion about this paying for that and needing 3 slips most places for DDP, tip, and OOP stuff it just seemed easier to do all room charge and paying it all at once. The servers were all so crazed I just worried a meal was going to get charged onto my rewards card rather than my DDP and after waiting awhile last trip to fix a few errors I didn't want to deal with it again.