The faq about the closure on the dvc website says that you can still bank the current points if the reservation was canceled due to the closure. I think you should call them.
this is correct. If your trip dates fell within the closure but past your banking deadline you can late bank those points. The 2018 banked points so far they are only allowing it for April and June but there is always a possibility they will extend that to Aug and Sept use years as well. No guarantee but definitely something you could watch for.