If I were to fork myself in this situation, I'd make one fork who thinks that making the trip will be awesome and another that will think that staying home is the coolest thing.

If we can, from time to time, merge our memories and refork, this wouldn't be a big issue, as both forks would experience both lives.

I think that, at this point, we wouldn't be that much human anymore.

You don't even have to modify it. If you are a person that thinks going and leaving a fork would be cool, and also thinks staying and sending a fork would be cool, the job is done.