It's great the Koozer already has a familiar place to go to. Honestly I think you might be more worried about the stay than he will be! It's not silly though, we all worry about our little ones when they aren't around! I mean I even worry when I'm just out for a couple hours at night!
One really nice thing that our boarders do, if requested is take pics of our guys and email/test them to us. If you have a good enough relationship with the kennel they might do the same thing.
Good luck! Things will be fine!
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