I agree with Jack 100% on this. I too have scored several “volunteer” rides on the Collings planes when I still lived in Florida. My first ride was a choice of either. Man, that was a tough decision, but I decided to first ride the B-24. My reasons for this were that there were plenty of B-17s around I could ride later on if need be, but one good prang and I’d be kicking myself for not riding the last routinely airworthy B-24. Besides, fewer people have ridden B-24s than 17s anyway. It’s the “rare bird” factor that I liked.
The next year when Collings came through my hometown, I got another ride, this time on the B-17. The year after that, the 17 was full and I was the ONLY person on the B-24 other than the crew! I had free run of the airplane and I was totally alone aft of the bomb bay!
And then the year after that I scored a P-51 ride

, but that's not the issue here...
For “Gee whiz” points, nothing beats a 17. And the view from the nose is sweet. But keep in mind you don’t get much time up there and its freaking loud being that close to the engines. For pure comfort and ease of getting photos, nothing beats the 24, behind the bomb bay. You have all the room you want, the windows are open, and that tail gun position view is something you’ll always remember.