When I have to leave Joey (6 month old) for a couple of hours, he stays in the laundry room which is actually pretty good sized. His crate & bed are in there with the door open so he can go in and sleep if he wants to. He has lots of toys & bones to occupy him. And, he gets a treat for going "to jail". That's my prompt for going to the laundry room-
"go to jail!". 
He goes willingly so that he can get his treat!
When he gets older and I'm sure he won't chew destructively while I'm gone, he'll get the kitchen
and the laundry room when I'm away. So far, his chewing hasn't been a problem, but knowing that it might get worse before it gets better, I don't want to give him extra space that I may have to take away later.