sleepless nights

Question
I have two one year old Labradoodles.  Seems from very early age they would wake up in the middle of the night to play.  I work all day so have a dog walker come during the day and then I walk them at night.  It doesn't seem to help at all.  I was up last night from 3:00 am to 5:30 am and they just wanted to run and play (and bark).  Is there anything I can do to help them sleep all night.  BTW - if I take them to doggy daycare at Petsmart they usually will sleep all night.  It is too expensive for a daily thing so I would very much like other solutions.

Answer
They may not adjust to it well now, but you could crate them at night.  A dog that has not been crated since it was little, may take some work.
Start out just putting its toys and treats in the crate.  Praise it for going
in.  Feed it in the crate.  This is also an easy way to maintain order at
feeding time for more than one dog.