You were in a strange home with new and way different smells to him. He acted normal. I would not reccommend taking him with you when looking only unless you know the people. You just don't know what they might have there when you show up at a stranger's house. No way! I even change my clothes and wash my shoes (in the garage - clothes and shoes don't even get in my house) when coming back from pet stores, shows, etc... You just need to be careful. I say this with love for your baby. Good luck on your search!
T.