I suspect Jim is correct. The USA used to be a country that said yes I can do that. Now we are the country that says, maybe I can do that but first I have to ask permission of the lawyers, government, and the insurance, and so it goes. We wounder why gas cost so much. Some of the cost goes to pay the aforementioned groups who stand between you and your goal with their hands out.
Of course it is for our own good! We are to stupid. Our lawyer, government, and insurance masters say so.
Keep going whee. Check what Jim said and see if it will pencil. The airports I have bought mogas at are over a dollar cheaper than avgas. Cal Black, Az. and Lebanon, Or.