We did all the pattern work at Midway in Midlothian (KJWY). While refueling we talked with Dave Wheeler and Aubrey Price of Airborne Imaging, Inc.. They operated a pair of DC-3's as platforms for testing stuff they couldn't talk about. But they could fly imaging equipment, racks of computers and data acquistion, and up to nine engineers/operators for test flights. Cool stuff.
This might be my only DC-3 time, although I'd love to fly one of these things.
Thanks for taking the time to talk with me Dave!