Nookie Bear
Striker
I used weed control fabric this year on plots I was looking to keep clear of weeds before I dropped in plants, as I usually work a few days in the garden and then am away for a few weeks. It can be useful in this regard, just by blocking out light, but it will not stop certain weeds from breaking through, which is the point of the layer of cardboard and manure on top. However, I would personally recommend before putting the cardboard and everything down, rotating bonfires of weeds and other organic wood on your plots to try and kill off some of the weed seeds that may be lurking. If there are any bindweed seeds in the ground, in my opinion, this will help make them unviable and probably save you a lot of headaches in the future. The ash should complement the manure well while processes are taking place over the winter.
The weather is probably going to be good enough for them to stay out for at least two or three more weeks if they are in a greenhouse. You will probably find everything slows down with them, and (assuming they actually are indeterminate) that the plants might benefit from some additional pruning of any sickly looking leaves. Just don't try to water them more than normal, because that will be likely to split the fruit. In theory most indeterminate plants will actually live until they are killed by frosts. I had a plant on my window sill last year that actually produced tiny fruits in February of this year.
Thanks
I'm having to harvest my padron peppers today and dump the plants - had no problems with greenfly til I moved them into the porch and there's bloody thousands in there now !