I am a teacher and a photographer. I'm going to shoot scenery in the wild and stay in the wild for a long time. What food should I bring?

I also like photography. Last time I went to Huangshan to photograph the scenery and Huizhou architecture there, I had a self-heating meal there, which was still local. I wonder if they are sold elsewhere. You can go to Baidu to search for the brand of Huangshan self-heating rice, and then see if it is sold there. This is my personal suggestion. Remember to bring more water.