If this is your first experience in "wild camping" I would concentrate on that. Just take a small 35mm and some rolls. After you have accumulated some experience you would begin refining the photographic aspect of the activity. There are a lot of things to learn through experience about hiking. And I would wait for next summer unless you go with some experienced else.

I have the (maybe unfounded) impression that you are taking this endeavour without realising that it is not banal. Hikers do kill themselves.

I hope you already have an experience as a "one day" walker and already know how to properly orient yourself, use altimeter, compass etc..