I have one.
32 liter bag.
Thermal blanket
Knife
Rope
Fire starting kit
Poncho
High calorie food bars
Water purifier
2 solar chargers
OTC Medicine
Assorted batteries
Soap
Flashlight
Heat pads
Crank radio
Collapsible pot
multitool
multi-utensil
Compass
Binoculars
Duct tape
durable bag
ferro rod
field guide
first aid kit
floss
durable gloves
guns of course
second set of IDs
map
Sleeping bag
tarp
tooth brush
Water bottle
water filter
water tablets
whistle
Believe it or not, a pack of playing cards and cash
Food aside, I could be completely self-sufficient with my bag for a few months.
Last thing I need to get is a gas siphon and a machete or large blade.
Building a second bag for my car
I'll take pics of my bag if anyone's interested and how I fit everything in a bag that I could carry if I'm hurt or was 80 years old.
"Food aside" is a pretty big aside.
You say you'll be completely self-sufficient for months, but how are you protecting yourself when you sleep? No one is self-sufficient if they have no shelter and absolutely anyone could just walk up to you in your nap and slide a blade in whenever they wanted.
Even when you're awake what is you and the one gun you can use at a time going to do for you against any band of guys who wants to steal your shyt? Hell, they don't even have to be better armed than you, they just have to set a trap in a place you'll look for food, or follow you until you're forced to let your guard down.
A single water bottle assumes regular access to clean enough water. Even with a filter/tablets, there's gonna be water sources in the city that you ain't willing to drink from due to pollutants, and lots of places in the countryside where you'll travel a long ways and expend a ton of energy before you find another source of water again. Plus the less water you're able to carry, the more often you have to expose yourself when shyt gets tight. And you know the ruffians are gonna be waiting by those water sources (and food sources).
Your rain protection looks minimal. Day or night, a serious storm has a good chance of soaking that sleeping bag unless you have a means of getting indoors. And you'll soon fine a thermal blanket is pretty meh on a cold night.
No antibiotics either? Of course, antibiotics degrade rapidly, so having them in a bug-out bag is a dicey proposition. You're basically just subsidizing big pharma if you keep sneaking prescription antibiotics from a doctor only to have to replace them again and again. But infection due to injury, infection due to bad water, infection due to bad food, who knows what kinda shyt the mosquitoes are gonna be carrying when society breaks down and control efforts stop....