'dollars' won't be anywhere. They have long had a system ready to implement that will totally eliminate cash.
All transactions will be with plastic.
Your every movement, your every transaction, will be instantly known...much as, for example, truck drivers are now.
A long hauler's every movement and location to the square foot is documented. Every fuel purchase instantly documented (and they not allowed to use cash) and just how fast they drive from point A to point B.
When they approach a weigh station, electronics can read - WITHOUT them actually pulling into the weigh station - their weight and give them a pass-by green light or a pull-in red light...Every minute, every action, is instantly documented - and I have only touched on a few.
Every town has web cams to watch every citizen.
Our guns will not be confiscated first - first, purchasing ammunition will be stopped...empty guns aren't much use. People are up-ammoing (how's that for poetic license?) now - but without a resupply, how long will ammo last.
Our ability to communicate will be curtailed.
But you are right in many ways. Freedom/Country loving people will not go quietly into the dark night of totalitarianism. We will fight - regardless. But having a way to grow much of one's own food and other self-dependent ways of old will be essential.
Any Freeper with enough technical ability to read the Internet can learn to reload ammunition in a day or two. I have been reloading for years with my modest set of tools which would total perhaps $150 for the essential stuff. Digital scales and progressive presses are mostly luxuries or designed for mass production of reloads.
Powder and primers will keep for years, brass cases and bullets have infinite life. All of this can be purchased today online from half a dozen or more sources; powder can be shipped at slight hazardous material premium.
I remember going out in 2000 on election eve to stock up "in case the election went wrong". Time to replenish my stuff!
Long enough to confiscate some more from our adversaries.