And I'm not talking about towered airports I understand the procedures for getting access to them I'm talking about non-towered airports and airports that aren't even attended.

I ask because I was looking at places I had flown into back home in Texas. Lake Whitney being one of those places. Out in the middle of nowhere, not even an attended airstrip at a state park. I found this on airnav

Additional Remarks

A96 ULTRALIGHT ACFT PROHIBITED.
http://www.airnav.com/airport/F50