The Delaware property is old farmland now managed by the Delaware Vietnam Veterans Motorcycle Club. There's plenty of room for the 1200 folks that show up, and it's in very rural area, so few neighbors. (However, there are one or two problem neighbors, hence the sound is dialed down after 2200.)
And regularly occurring events makes for easier planning and logistics. Kinda nice to plan ahead, especially if you have complex art pieces or little vacation time. Besides, you get a folks that show up each year, and it's kinda nice to have familiar faces. I doubt you'd get that for spontaneous events.
Irish pipes? Uilleann? FSM, those look impossible. Jeebus, looks like you need a PhD and a pilot's license to operate one of those.
I've got a set of big pipes, but also have some shuttles that I love love love to play. Unfortunately they're too quiet, if you can believe it. So I have on order a set of Scottish smallpipes which have the perfect volume for pubs. Loud enough to hear, but not overwhelming. That, and being cauld wind instruments might (hopefully) mitigate some of the dryness issues of Burning Man. (No worries about PDF as it's fairly humid.)