Update - 9/4 (the next morning)
Ian's night was pretty typical. He tossed, turned, and mumbled all night. He also had a short argument with his sister...? I didn't sleep most of the night with all the commotion he made. The techs came in a couple times to check on the equipment and once to reposition the tubing on Ian's nose. This morning they were very nice, but pretty unceremonious about sending us on our way. Just pulled off the electrodes and straps, and tape, and netting, and said goodbye :)
Results will take a couple weeks to be sent to the doctor, but I'm pretty sure I already know what his recommendations will be. "Stop arguing with your sister!"