My field time credentials, I lived in a bamboo hut in a remote jungle village for 2 years with no running water or electricity. I did not have to hunt for my meals. I was able to resupply myself with 80-150 kg of food and tobacco from the capitol every 120 days, I had clean water and a river to bathe in, the village supplied me all forms of local food but I did spend time in the gardens when I could, I was not allowed to pig hunt as hunting was proscribed by a in-country Peace Corps regulation plus the village Chief was worried I would get killed.
600 days (give or take) x 2 cooked meals a day = 1200 meals minimum. All of your ammo loads should have at least 2000 hunting rounds (can I get a plasma rifle?

)...
When I was living stone age I had to spend 3 hours a day on 2 cooked meals, factor in building a fire, food prep and cooking and then clean up. Now add gathering to that number it adds at least 10 more hours a week (two trips to the garden, digging yams, planting yams etc.) even more time will be needed if you are hunting. Now add low calories and decreasing energy your times will increase on all tasks.
Starches, carbos and vitamins are going to be rough to procure on the trial.
As your body runs out of these basic building blocks healing, endurance and recovery is going to suffer.
All batteries die. All solar rechargeable anything die. All fabric rip, rats and raccoons eat tents and backpacks and extra clothes . LED lights are one exception and the led lamps would last barring a large rock smashing it

. But the batteries that run it will run out and then it is just dead weight (can we get any "space" 123 batteries that will last for 3 years?

).
A good self winding watch, a tough compass and a detailed map of the pick up location (think top of predominate hill at the mouth of a predominate river that I can find with no map or compass).
Soles split off of boots condition your feet to moccasins that you can produce yourself.
Alone you are not going to fight the natives. If it comes down to a gun/bow fight one moderate wound to you and you are dead. Perhaps consider diplomacy over an assault rifle (and optics that will fail only add weight). You need a great hunting rifle with very few moving parts. A non-plasma handgun seems to be dead weight to me.
I would further suggest you pack on 30 extra pounds of fat on your body and condition yourself to move them around to give you an internal reserve. If you start walking at 5% body fat you have a very slim margin of error on food collection rates.
Cleaning, if you dont bathe and wash your clothes semi regularly any scratches, cuts and bug bites will be come very infected every time. Your going to need soap.
First aid, your going to need a host of meds/supplies. If you are not prepared one nasty cut will kill you. Also I think I read that malaria was in pasts of the US back then so you are going to need a cure or two. plus all the other ills that befall you when you move somewhere new.