The answer could depend on your pack of dogs, assume you have more than one. Some of our dogs enjoy their alone time from some of their package members and seek out the refuge of the crate. As long as the crate is big enough to turn around in, they don't being in the crate all night and will even go in one during the day for the alone time.
I don't see a need to join crates unless one is too small.
Jim
I don't see a need to join crates unless one is too small.
Jim