Well as far as sleeping, you really need to put him in the crate for a while. It only takes a couple nights. There are a ton of debates on letting the pup sleep with you, however my only warning is once you let them do it, then it is a forever thing. So, if you let him sleep in your bed now be prepared to have 90lbs and 4 legs stretched out next to you in a year. Not that there is anything wrong with that. My boy sleeps with me and I enjoy it. Just saying be careful what you do as a puppy because they are incredibly intelligent and they do not forget.
I let my boy sleep in my lap as a little pup and well now it is expected.
Then yes it is perfectly fine to put him in his kennel. I also recommend getting this Amazon.com : North States Superyard Play Yard, Grey, 6 Panel : Pet Kennels : Baby
A playpen is great, it gave me a lot of free time and a lot of enjoyment. We could both sit out on the deck together him in his playpen and me at the grill. Then bring it right inside. It comes apart and separates so when he got a little older and teething, I gave him more room but I used this to block off the TV and the wires so he wouldn't get into them. It can be useful for a lot of different things when you just need a break.