Solo Camper no Furatto Isekai Kimama Tabi

Ko is a slightly unusual high school student whose hobbies include solo camping, and whose dream is to travel around the world someday. One day, he is suddenly caught up in his classmate's summoning to another world. Rather than being treated as an unfortunate afterthought, Ko leaves the royal palace behind and decides to pursue his dream using a mix of survival knowledge from Earth and magical power. A popular work originally published under MF Books, now adapted into manga form. Ko's first long dreamed journey begins in another world, as the laid back slow life of a high school survival expert unfolds.

(Source: Futabasha, translated)