Rae said what I was going to say.
Money eh, so much paper, fuel yeah, arms and ammo sure.
Fire bombs on a parchement/paper product to risky.
And lastly,
I find scarey that you are able to name the title and where in the series the show is. That will cause me some distress
One other thing, the IOWA or Nebraska who whatever the flat state, they all look the same
The force didn't have any support weapons, a SAW, a M60A1, or some old M1919 Brownings in 30-06 or converted to .308. Maybe some Mad Max type support vehicles, a tow truck that was armored and turning into a troop transport or combat recovery vehicle.
You could toss in some other groups, a larger marauder group, some Mexicans or Russians made it that far south, the Soux or the Pawnee or the Comanche going off trying to start their own country.
Also, which copy of the Declaration of Independence is it that got captured? There are 3 original copies.