I just got a call from Jay Baeten offering his home strip as a staging area for 170s going into Oshkosh after the convention. His strip isn’t on the chart but is in aviation databases as 9WS2. It’s about 35 miles northeast of KOSH, located about 8 miles south of KGRB, about a mile west of the GRB ILS 36 localizer. Jay says he has room for at least 50 airplanes, and you can pitch a tent or lay a sleeping bag on the floor of his 90x45 hangar.