How To Travel With A Gun

I am planning a trip and I am wondering how to travel with a gun. I understand that there are certain laws and regulations that need to be followed when traveling with a gun. I am looking for advice on how to safely and legally transport my gun while traveling. I would like to know what documents I need to have, what type of cases are available, and what the best practices are for traveling with a gun. I am also interested in learning about the laws and regulations that are specific to the state I am traveling to. Any advice or tips on how to travel with a gun would be greatly appreciated.