How real is it? Well When I'm flying my Jenny, I can Marvel at what it must of took for a fella to get in something like that and most of them had no formal training, no closed cockpit, maybe a fuel gauge, and sorry people no AP and Nooooooooo.............GPS!

Had to have a good watch, a at least a handheld compass,
"There were no maps of value to airmen in those days. Official state maps of the region were all of different scales and showed only political divisions with nothing of a physical nature except cities, towns, rivers, etc. We had to fold large maps of the USA into a strip to have everything on a uniform scale. Naturally, they contained little detail. In addition to poor maps, the magnetic compass was highly inaccurate, affected by everything metallic on the plane. Pilots needed a sixth sense about navigating, and many didn't acquire this until they had flown a long time."
When I fly my Jenny just above tree top level with the luxury of an old Rand McNally road map, makes me wish I was born in at least 1890!
Here's a few more excerpts from:
http://www.aerofiles.com/airmail.html"The best plane we have is the Curtiss JN-4D Jenny, and it will fly only an hour and twenty minutes. Its maximum range is 88 miles at a cruising speed of 66 miles per hour." He also mentioned the shortage of pilots, how very few Air Service pilots had any cross-country experience, and the lack of mechanics."
"Fleet selected Lts Stephen Bonsal, Howard P Culver, Walter Miller, and Torrey H Webb as the most experienced pilots available