I can't speak to the FDR promise. But I've always understood that there are no entry fees to the GSMNP because the owners that donated much of the property that comprises the park stipulated that the donation was on the condition that an no fee would ever be fee charged to people to see park. I think the parking fee charge is breaking the sprit of the agreement. I wish there was another way for the park to collect the much needed fees. My understanding also is that your annual or lifetime NPS pass from the USGS does not help with the GSMNP parking fee.