These guys have suggested some of the absolute essentials: Will, Desire and Sense of Adventure.

I will add a sense of humour, a willingness to put up with adversity with the knowledge it won't last forever, and a willingness to experiment.

All of them personal traits. All of them non-reliant on technology. All of them can contribute to a sense of achievement at the end.

The rest of the stuff is just personal preference. There is a good chance that whatever you think you need, you probably won't. And whatever you think you don't need, you probably will.