Thanks! My biggest thing isn't that he's going to crawl off the bed, exactly - it's that he needs quite a bit of room behind him to sit up. Which he, of course, thinks is the greatest thing EVER. So he gets pretty close to the edge and then tries to sit up, and if he does it when I'm sleeping and the Mr. isn't in bed, he's probably going to fall off one of these days. Best solution is just to get up when the Mr. does, but I don't like 5.30 in the morning very much.