I do not know the etiquette regarding pop ups on the flight line, it just seems that folks who got a site right on the line do so, but very few at that. The only public power I know of will be in the build tents, there is usually plenty of room there to work. I got a site right there on the line, close the the fest center, keep in touch and you're welcome to use my rv to charge and likewise to cool off under my awning.