I can't answer your question because so far the sleep sack trick is working for us. However, can you just close his door?nbsp; I wouldnbsp;take out all toys except a few books and close the door.
He just opens the door, so that doesn't contain him. I sure wish it did.
I just realized someone else posted almost the exact same question a few posts down. One of the suggestions was to turn the crib around so the high side is out and the low side is to the wall. I did that, so we'll see if it works. Fingers crossed!