there's a lot of good reasons to not sleep with gun.
There have been plenty of times I have awakened completely disoriented, no clue where I am or who I am, or what planet I was on. This only lasts for a few seconds, and it dosen't happen on a regular basis. I would want to have a second step between sleep and being able to fire.
When I was in high school I used to have to hide the alarm clock in a different place every night. If I didn't, I could turn it off while still sleeping and fall back into bed. Hiding it made me transition to concsious thought. There is that goofy almost awake period, maybe still dreaming, that I think is probably the most dangerous.
I don't think a holster or a 1911 type safety will make that much difference either. If you drill and practice enough, drawing and dropping the safety are part of firing. If I'm waking from a particularly vivid dream about being attacked, and the weapon is at hand, bad things could happen.
My kids have scared the crap out of me, waking me up from a distance of about six inches from my face, usually from some middle of the night crisis( missing blanky,stuffed animal, or potty accident), from the deepest sleep. The thought of even covering one of them with my muzzle, even for a nano-second, is almost too grusome to imagine.
My junk is accessable, but I have to be out of bed, and move in a purposeful direction to get it. The dog will have to provide me warning time to get that far. (that's why I have a dog)
YMMV