I used to do the same thing, though more often towards mid-afternoon or after dark, and no porn stashes… the only thing I kept out there was bottles of oil for lube. It was more about connecting in nature. As soon as I got a bit past the tree line, clothes came off and the rest of the hiking and time was spent nude. Only caught (and watched) once over the many years I did that.
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I loved going to a state park and finding a secure area like a thick grove, still close enough I could hear other campers. I masturbated listening to all the normal camping sounds
I have a deep connection to nudity, masturbation, and the forest. I grew up in a rural area and after school, loved to go into the surrounding woods. I’d get naked (we called it “playing Indian” back then) and just relish the sensation of being naked in the outdoors. As my sexual awareness grew, so did my love of leaving my cum on trees around me. To this day, when I am in a forest area, I feel that impulse to get naked and masturbate.
We had a large tract of undeveloped land behind our house when I was growing up: I loved to go on naked frolics through the woods and masturbate in nature. Part of it was the thrill of being nude outdoors–the wind brushing against my skin, that feeling of freedom. Another part for me was the erotic thrill of being totally exposed where I might be seen. Just the idea that my nude outdoor masturbation sessions might be spied upon was a huge turn on–I would get hard even walking out of the house for a naked forest penis-pull.
Being naked in nature has such a primal powerful feel to it. A friend of mine is a practicing witch and we have discussed at length the symbolism of seeding the earth with sperm, the sacred phallus and its power of fertility, like the strong trunks of the trees. The feeling of being totally nude and erect in the middle of all that, wearing nothing but my phallus amulet and maybe some bracelets and anklets, is like nothing else. Sometimes I start with a cloak and disrobe once I get past the tree line, to add to the ritual significance of it.