Mine went into ordinary single beds as soon as they could climb out of their cots ,never had any problems with beds ,My daughter didn't sleep through the night until she started school but if she woke she stayed in bed and looked through books ,we never had them in our bed .
We didn't have stair gates either on the advice of my lovely GP who was mother of 4 teenagers then .
She said " when will you feel safe to take a gate away ,when she's 4 or 5? Surely better just to teach her to go down stairs on her bottom and climb them holding onto the rail"
She was absolutely right ,my first GC was great with stairs until he discovered it was more fun sliding down on his front ,we put a wee crash helmet on him...lol.He was 20 last week .
I have said on here before that I am a very chilled person so that probably helped .