the a/c will be off while you are out b/c it only works sensing movement so you have to look up the bypass code for the thermostat control or get a balloon to float around the room. Our DD2 is used to fleece footed pajamas at home -year round, b/c we have the a/c set to keep her room at 68. -or the heat. she too does not use blankets correctly, so i dont want her too chilly. i did however, have the same concern. i bought a 2 pack of long sleeve cotton disney pajamas, with no feet to take in case the fleece is too hot for some reason. I plan to keep the room at 68. However, then like others say, they get their little one in pj's at the park that way when they fall asleep out, there is less waking involved without needing to change them... if you go the fleece route, then that would not be possible. -unless it is December at wdw.. that can be COLD!