Gsmnp At thruhiker permit is required for "0vernight stay" in gsmnp. It does not define that as camping anywhere.
SNP defines camping specifically as any use of shelter or sleeping gear at any time. does not have to be at night.
Yosemite will tell you they will ticket for having overnight gear without wilderness permit.
Parks respond to their individual problems, and tend to clarify their own rules around that. The thruhiker permit is new. Attempt to abuse it by weaseling around it, and those that follow you will surely like the next changes even less. Especially given the rapidly growing numbers, theres more stringent controls looming anyway.