Here and in the past babies are ponied off their moms and hauled whenever, where ever. You're past that so tie them next to a calm buddy in the midst of chaos. Expect them to behave and don't baby them through their fears. Not saying no attention just make attention (like grooming) matter of fact and business like. You're there, you're not stressed so they have nothing to feed off of. Walk them around, stop and talk to people and let them look. All matter of fact.