You don’t need “stuff” to kill deer. In addition to the clothes i carry only a grunt tube which is 100% necessary if you want to have any hope of turning a buck passing by out of range and a range finder so i’m dead certain of my ranges but you could do without it. Mine is so small it fits in a pocket though.not clothes. Stuff. Gear. Gadgets. Calls. Scents.
Scents have scared more deer away than they have attracted. I stopped using those at least two decades ago.
Not sure what other gadgets people would be carrying other than maybe a cell phone.