Before

a little rework before I decided to go get some plastic bins

and the finished job (at least for now)

Not sure everything will stay put rolling down the road and do not want extra rattling noises to scar Nicky so may have to add padding of some sort. I like idea Sue had for using swim noodles - hope I can still find some now that out of season.
I'd like something like Liz did for holding broom, brush and my grabber stick but since I don't know where any of the wiring/plumbing elements are located, am hesitant to make any holes with screws.
The rolling walker is still the biggest problem child in storage. While I rarely need it any more for walking, I have used it frequently in bath house where no shelves for soap/shampoo, etc as well as place to sit while dressing. It also comes in handy for trips to laundry as I cannot carry anything heavy and walk.
Anyway, I was quite pleased with the results. If anyone has suggestions for taking better advantage of the height, I would welcome them. Plenty of unused volume there; seems a shame to waste it.