My preference is to have lots of lightning cables with chargers in various locations. That way I don't have to move them around. Cars have two chargers each so both of us can charge when traveling together. We have 4 by the bed - iPad and iPhone each, both get charged overnight.
In other accessories I like a bumper type case for protection and to make it easier to grip. Another great item I recently got is an iRing that makes it easy to one hand.