All NY venues by law must offer physical tickets. As for NEF, it's in orchard park which is a somewhat rural suburb. I'd be shocked if they greet fans (although there's plenty of cool stuff going on on the grounds). They usually fly in and out so I doubt there will be a night before sound...
Looking for two GA, seats, or RZ. Had someone selling two seats and can't get in touch with them and my flight is booked. Will pay with cash and ticket karma. (And Buffalo tickets if needed).
Well that didn't take long:
2 Tickets U2 7 30 MSG | eBay
Listed around noon today...looks like these are the $35 seats, from tout to agency in the blink of an eye.