This is what I would do too
Yes, but a disclaimer. My poles are octagons made from 4x4’s, stacked one flat face against the other. I don’t know how round poles would stack in the same space.
If I were storing jump poles made from PVC pipe, I’d add a third support. PVC sags and will take on a permanent bow over time. That’s why I quit using PVC jump poles.
Mine are same.
I messaged you a quick question
Schneiders jump holder mounting plates are 2 inches wide, Mounting holes are 1-1/4 inches apart on center. Distance between pole holders is 10-1/2 inches from the top of a lower one to the bottom of the one above it.