Any good ideas for a gift to give a guy for a long distance drive?

I want to send my long distance boyfriend a gift to make the drive more enjoyable.He is driving 2200 miles , yes driving because he is towing his boat back here.I was thinking some snacks, he already has sirius satellite radio,so I ruled out music CD's but maybe anyone can reccomend a audio book(non fiction) He is kind of the serious type in reading loves history, fishing, hunting and a good comic cd- I had already got him mitch hedburg CD (if you have not heard of him/his cd is really funny) he loved it. Any reccomendations or additional ideas to ship to him before his long drive? And if it makes any difference he is traveling from Montana to Virginia