It's funny how a generator creates peace of mind, and yet we don't consider the magnitude of the disaster for which they give us peace.
Many gas stations/convenience stores and other small consumer facing businesses have generators because generators have proliferated and they have a financial incentive to have one. Sure, not all of them have generators but not all of them need it. If your two preferred gas stations are down and the third one is crowded you'll make do fine. This is what's different from '03.
Getting fuel in a blackout is a non-issue logistically. Paying for it is where the most problems will be because so many people don't carry cash anymore.
Assuming cell network stays up, it is just another redundancy element, have a mobile network backup to landline network.
For carbeurated engines (i.e. every small piece of power equipment) you just need to drill out the precisely sized hole fuel goes through to be a different precise size. Your bigger issue will be keeping it clean long term.