I start to disconnect about an hour before but I don’t completely turn off the notifications until Right before i go to sleep.
I don’t have any electric appliances in my bedroom except from a light and a CD player (which is rarely on). My phone stays on (although in Silent mode) as I use it as an alarm (I plan on getting a proper alarm clock) and the Calm app to read me a story. I’m afraid my phone is by my bed though.