I feel for you Midwest divers. I was one for a decade.
Fills were a royal PITA. Shops use them as a weapon. They really do. Thankfully a couple of buddies eventually bought a compressor, set of bank bottles and setup a small fill station including banked nitrox. That was awesome.
Here in South FL it's heaven. In the North Broward/Palm Beach County area (Pompano north to Jupiter) where I am I have at least 8 places to get fills that I can think of and the total is probably closer to a dozen as I'm sure there are some I've forgotten.