[cypher]

I think for any car journey however short a carrier would be a lot safer & 10 minutes in the carrier shouldn't stress him out.
You never quite know how they'll react to finding themselves in a different environment, some are fine & others find it quite stressful, keep his cage just as it normally is & don't clean it too soon before he goes so he has his own familiar scent on everything.
Will he be cared for by someone he knows or who has handled him before? If he can get to know them a little I'm sure it would make things easier although it's not essential.