Going fishing / gone fishing / went fishing

Hi,

Suppose you're about to go fishing and you want to leave a note for someone. Which of these are you going to use:

1. Going fishing. (short for I'm going fishing)
2. Gone fishing. (short for I've gone fishing)
3. Went fishing. (short for I went fishing)

Well, I'd use 2. but a Brit once told me he would use 1. His explanation was something like: "I'd be thinking about the current moment and that's why I'd use the present progressive."

Still, I think that 2 could make sense - I'm thinking about the moment when someone's reading the note. At that time, my action is best described using the present perfect. (Q: Where is he? A: He's gone fishing.)

Thanks in advance.