Sam stops immediately, staying close to Castiel. He looks up at Dean, knowing that he looks at lost as he feels for a moment.

Then he takes a breath and turns to Castiel. "Or I can carry you in. I probably should have offered earlier, but I wasn't sure how much pain you were in. Dean can find you a room and Kevin can help him get it set up when he gets back." They'd had to call the prophet from the road, sent him to get a few items from the store. "I'll take you to the bathroom and we can get you cleaned up. Dean can make sure we have the first aid kit in there fore after you've cleaned up."

There's a chair in the showers because sometimes Sam and Dean are injured enough to need to sit. It would be useful here, too. "You're still one of us, Cas. We only want to help."