How do you stop a 6 month old puppy from crying and barking in his crate at night?

Can you move the crate into the guest room? Sometimes if you warm a small towel and roll it the puppy will snuggle next to it and go back to sleep. Sounds like he misses his pet parents or someone in his room.

It sounds like he's a bit stressed out in the new environment. If he's otherwise fine in his crate and is just waking up earlier than usual, it's probably the anxiety of being in a new place and should get better over time. It may help to move his crate closer to you so he doesn't feel as alone or keep some chews handy to help him relax again if he wakes up early.

For me, lack of sleep is one of the hardest issues to deal with when hosting a new dog; if it's a problem that persists throughout a stay, I'd seriously consider whether or not I want to host that particular dog again. Not only is it hard on me, it's a clear sign that a dog is not adjusting well to my household and perhaps a different situation might be better for him in the future.