I have been digging out information for all around Nahuel Huapi National Park. I finally found something that actual mentions delta wing paragliding:
La Angostura incorporated to its gentle urban layout a golf course, a "country" (gated residential compound), a ski center in Mt Bayo (meaning and an excellent hotel infrastructure facing lakes Nahuel Huapi and Correntoso).
The latter fact makes it specially suited to the practicing of nautical activities, especially fishing, all kinds of navigation (windsurf, sailboats and cruise ships) and, obviously, trekking, horse riding, mountain biking, hang-gliding and delta wing gliding.
La Angostura is highlighted on Peach's fine map. I consider it NW of Bariloche, but the direction from where the Limay River flows is SW to NE, entering Nahuel Huapi Lake at its further south point near Bariloche. Its most salient feature for delta wing gliding is that up Cerro Bayo there are no fewer than two double chairlifts, five teleskis, a T-Bar teleski and two Baby-Lifts, with a total uphill capacity of 4,500 an hour.