TexasCHLforum.com

Federal law says that if the weapon is legal at the beginning and end destination of the trip, it can be legally transported unloaded in a locked container in the trunk. There have been some cases where New York and New Jersey have claimed the law did not apply. I think most of those involve flight, and the one I know of that went to an appeals court was involving a person stopping over between flights.

I think you would be safe with it locked and unloaded in the trunk, especially if you don't give anyone an excuse to search it.