We used Kids Nite Out on our last trip with our twins 5 years old at the time. The lady came on time. She showed us her ID without us asking (I'm sure you can ask). She also gave us a policy form to sign about what they do and don't do (like they don't do anything water related). I don't think they would take them out of the room, you can always discuss your expectations with them, we did and the lady discussed her expectations as well. She described some of things she typically does with them such as in room dance party, coloring, and disney games. We discussed when we wanted them in bed and the bedtime routine. We also set up a Nest video camera on the desk so we could check in (DH was paranoid). And sure enough at one point they were dancing and singing and at another point just before 8pm, they were in bed with lights out, just a small light on with what looked like her in the corner reading. When we got back, sure enough they were in bed and asleep. The next day the kids said they had a blast and wanted to have her "visit" again. We did have to provide dinner for the kids and the sitter. We picked up a salad, some sandwiches and sides from the resort QS for her and the kids since we had the sitter in the evening for longer than 3 hours. It all worked out very well.
