I wonder if the backpack is a hydration backpack?
Agreeing with others that the duffel bag looks mostly empty (worn cross-body across his back), looks like a jacket or pullover tied around his waist, and that the shoes look possibly like water shoes of some kind.
His hair looks pretty clean cut (except it's hard to see the hairline because of the scarf or gaiter around his neck).
Also, that outfit/gear looks hot/heavy considering hiking in Arkansas midday this past week was likely very hot.
MOO.
I originally thought a pullover around his waist as well, but the stripes on the right side are nearly identical to the stripes on the left of the duffel. Makes me think it’s either a massive duffel, or he has two.