-Estimating it to have almost double the range between fuel stops, which can save a decent chunk of change depending on areas
This^^^^
If you are a Sam's Club member or use the GasBuddy app you can find locations that you might not otherwise think of which can save money on gas. But also if you know what each state charges for gas tax and have the kind of range you mention you can save some money by topping off in low tax states and avoiding (or minimizing) buying in high tax states.
Fuel taxes in the United States - Wikipedia
en.wikipedia.org