We have a Welsh Terrier, so just slightly smaller than what you're thinking of. He has a 3'x2' (i think) crate, which gives him loads of room - it is his bed, and is very comfy in there! It is under the stairs (open) so in the hallway - if we had somewhere more out of the way I'd rather put it there, but we don't. It has a blanket over the top as he seems to like having a 'den', and we flip the blanket down at the front when he's gone to bed. He often goes in it to sleep in the day (also has a bed in the corner of the living room).
We don't use it now when we go out, but up to a year or more he was always in there when we weren't around, for his safety and our peace of mind. His mum had a crate, and sort of a play pen for the puppies, so he has always been used to it, and has slept in it from his first night with us - just outside our bedroom door! (I will always remember him waking up that night, me letting him out of the crate, he did a wee on the newspaper by it, then went back in, curled up and went straight back to sleep - any qualms I may have had about crating him disappeared then!)
I think of it as his bedroom - if he's in there no one bothers him. Doesn't make him any less part oyster family