My question is what method would see the best growth.
Planting in the ground, not a pot, will give the best growth.
I suggest using the stump as support. Native hops in the Gunnison Basin grow up rock escarpments.
Don't worry too much about what the pros do, since you are at home and just want to grow a few pounds for home use.
You could try attaching a little metal pig panel upright to the stump,
to give a rigid grid to grow on. 10 feet high plenty.
Hard to go wrong, if you irrigate.