My cats were always allowed in the bedroom. Lately, the youngest one, who is the least affectionate and the most adventurous and most-likely to get into trouble, has been waking us up every night. He will leap into the air to grab onto the curtains, he will jump onto the bedside table and knock off pill bottles or jewelry, he will scratch at the closet and meow and jump on things. He doesn't come up onto the bed at all or touch us, but he definitely seems to be trying to get our attention. We have two other cats and they just sleep throughout the night and never wake us up.
I have tried spraying him with a water bottle, but that only stops him for ten minutes or so, or he goes and does something outside of my range. We've been locking all of the cats out so that we can sleep but we would like to let them in.