All of your comments - Rich, Sue and Bill are greatly appreciated. I know when I used to work on my MacBook at a kitchen "bar" and sit there for hours...that my carpal tunnel would become terrible due to the angle at which my elbows were - and my neck, too. All more points in favor of the iPad - mini or air. I did hold the air version and it was, indeed, quite lovely, Rich.
So do I go 32 - 64...? I'm assuming I can keep what I like and move them to LR...not sure if I'd have to do it via the MacBook and then on to the external hard drive where it lives in perpetuity. (I do sound serious this time, don't I?)
If I was buying now, I would go 128GB. The bigger, the better, for the photography. It gives you more base storage as well. I know its expensive but its probably going to do you for some time. I only bought 16GB when I got mine and really wish I had gone for the max available at the time which was 64.