Saving bean seeds first frost not dry pods yet?

I wanted to save dragon tongue bean seeds but the pods never dried enough. There are some pods that have plumped up, i pulled all the plants up and brought them inside if. I take all the immature beans off and hang the plants with one or two beans on each that are plump pods will they dry and have viable seeds? Or are the seeds just to immature, How plump would they have to be to mature fully, or is it just not worth the effort this year? thanks.

My philosophy is to take the most plump seeds and replant them. My experience with seeds leads me to believe that they become viable much earlier than they reach maturity.

I just pull the plants and let them dry, regardless of how plump or not the seeds are. I can sort them later... Typically, I let the fall frosts kill the bean plants, then a week or two later I thresh the plants and harvest the seeds. We are 6 weeks late on our fall frosts, so I eventually ended up pulling the plants and allowing them to dry in the garden. Rain is expected for the next few days, so I guess I know what I'll be doing tomorrow.