I love your list of the 25 candidate cities! Given FAA restriction on operating in ”crowded areas” might I offer that the areas most want to see in these cities are inherently crowded and therefore restricted. An alternative could be sites, that despite being more rural, are nonetheless very popular with tourists, e.g. Fredericksburg, TX (wineries, hills, rivers, Enchanted Rock). Napa and Carmel also come to mind..