We have beds inside and outside and generally leave it up to the dog. In cold weather they stay inside. But, once the door is closed for the night they stay in or out.
I have a feeling he is gonna stick to you like glue so it is gonna be his decision, probably.
None of our animals sleep on the bed, couch or a chair. They have their beds and either that or the floor.
He's a handsome boy and he'll be your bestest friend forever.