Hi rtj1211,
I tried Pots, then Growbags and then Growbags with Ring culture Pots.
I now exclusively use Potato/Tomato Planter Bags and I find that the plants are bigger, stronger and yield exceptionally well outdoors here in Ireland.
Because I am constricted by the last frost date here (circa mid May) I don’t plant outside until late May but I get harvests from August through to end October.
If Ihad a Pollytunnel I’d love to experiment as you are.
Don.