Just my 2 cents. I think if you feel value in it give it a shot and don't listen to anybody, but the fact that it is not insulated and sitting over your trans tunnel, I don't really see it being a viable solution especially for the size. You really can't keep much in it. I think you would be better off with a cooler that is the same size if you can stash it behind your back seat like you planned before. Seems like a better plan, Especially if you get a soft one like you posted to me earlier. That can save space especially because you can squish it. I think
@EJD made a good point with his Twix. I know no matter how much is you put in you probably wont get 5 hours unless you can seal it up tight.
Just today my Tj was in the garage. It was 100 degrees out but my TJ was 114 inside. That wasn't even the center console sitting over the trans tunnel. My guess would be that even if you could insulate it, and seal it, and put dry ice in it, the room you would finally have left wouldn't be enough for your needs. That is just some things I have been thinking about it, but I do like your drive, and would be very curious if you did decide to do it, what you came up with and how viable it was.
Even if you did figure out the cats meow, and I was able to adopt it. I really need the console for my junk. I mean if I took my junk out of the console to make a cooler, I would have to put my junk in a cooler somewhere else.
I think it is a cool idea, but I don't have the same vision, but am curious nonetheless.
Keep us posted if you decide to go forth!