Aaron....

Where does he live? You mentioned he was back and forth between (I assume) VA and FL. Does he even have a residence anywhere near where the land is?

If so....sure....go by there. If not....the letter is fine.

IF you go to see him.....you are opening yourelf up for him to talk about the hunting with you. If you send a letter.....the permission is already given and he can't discuss that with you. I guess what I'm trying to say is.....Don't risk a dialogue that might could change what you already HAVE (i.e. permission). Just send him a letter thanking him for said.

That's the way I'd approach it.You do what you think is best.