Probably not an issue with a golden retriever, but if someone does find this dog make sure that you approach him properly, because he may be scared or fearful, since he is not in his own territory.
A generic approach from
http://www.citizencanine.org/safety.htm
How to Meet A Dog
Never approach a strange dog without permission from the owner.
Approach a dog slowly with the back of the hand extended.
Curl your fingers and allow the dog to sniff.
Stroke the dog gently on the chest or shoulder, or under the chin.
Do not pat the dog on the top of the head.
Avoid approaching dogs that are sleeping or eating.
Stand still like a fence post if approached by a strange dog; do not squeal or jump, or wave your arms.
Avoid making direct eye contact with the dog, as this may be interpreted as an act of aggression.