Planning on going this weekend. I can take a southern route down I95 through Richmond, then I85 though Raleigh, then west to Nashville, Memphis and Little Rock. Or a northern route through Pittsburgh, Columbus, Indianapolis, St Louis and Springfield. I've gone over 250 miles on a fill-up and I don't see any stretches much more than 200 miles between stations. Using this DOE station locator: https://afdc.energy.gov/fuels/natural_gas_locations.html#/find/nearest?fuel=CNG