When Spud first arrived here, he had space aggression, my DS's friends would be over and play video games, and if one came too close to Spud's dog bed, he would growl. That did go away, we gave him space, and nobody bugged him on his bed, but over time we moved closer, and now we can sit on his dog bed and pet him, he is fine.
Now the bark, he did that too, whenever he wanted something, like going outside, or be fed. not aggressive, but he let out one loud woof, right in my face, and it would send me into orbit, every single time. I think over time he just got that it startled me, he is not doing it anymore, I'm not even sure when that stopped, I think when I got a second Grey, and he noticed she communicated much quieter, yet effectively. I think I probably let out a startled shriek over the barks, so maybe try that, but mostly over time, he will come to realize there is no need to be worried about being disturbed while sleeping, they just need to get used to it. I would not let him sleep in the bed until he is bombproof, in fact, I don't to this day, mostly because I don't want 75 pounds of dead weight in my bed, he is quite happy to sleep on his dog bed, most of the time not even in my bed room.