My one ride in a B-17 was back in 2002 aboard CF's "Nine-O-Nine." It was a blast!!! Quite literally a dream come true.
As this was back when digital cameras were in their infancy, I went aboard with my trusty Panasonic digital video camera (of course it recorded to tape, not an SD card) and had it running for the entire flight. I just left it running and pointed it at everything in sight. I was seated in the waist section to start, so I held it up and pointed it out the waist window to get footage of taxiing and takeoff and later edited that together with footage I had taken of a different flight taking off and I ended up with a cool 2 camera video!! My shots inside cut to the B-17 taking off and back, etc, etc. Pretty neat for an amateur in 2002!
We were allowed up right after takeoff and I made sure to take time at every station. The nose was most popular, so I loitered in the waist and radio room, spent time with my head, shoulders and video camera sticking out into the slipstream. I hung out in the bomb bay and made my way forward, savoring everything. Climbed into the bombardier's seat and took that in.
Anyway, I had made friends with fellow adventurers and they took photos while I did the video and we made a deal to share our results with each other.
I recommend having a friend come along with a video capable camera and get footage of you two walking out to the bird and climbing in, engine start and taxi and takeoff, flight and landing footage. That way you can concentrate on enjoying the experience and edit stuff from the onboard video footage you take aloft.
Before you go, make sure you stretch your face muscles to keep the flexibility - you will need it, cause you'll be grinning like a madman for the duration of the experience. I'm grinning NOW in memory of that day!!
It was about experiencing and by leaving the video camera running, I got terrific footage without having to pay attention to it. I avoided the trap of "doing" through the camera instead of actually living it - you know, like people at an airshow that "watch" the plane flyby on the screen of their iPhone.
If I had the chance to do the ride today, I'd bring a small video camera and attach it to my shoulder via a clamp (Peak Design's Capture POV is AWESOME - see it here:
https://www.peakdesign.com/product/clips/capturepov) and have it running the entire time. If you don't own a GoPro you can rent them from LensRentals.com. IF you want to avoid the bent props that you often get with rolling shutter in cameras like the GoPRo, get something that allows you to adjust shutter speed down to 125 to smooth things out.
Enjoy!
VB