Do i have to let my guests know there will be no wedding this year?

My wedding date is October 10, 2020. We ordered and received our invites about 4 mos before the date (in late June/early July), but we literally on the 90 day mark decided to postpone. So we did not and will not send out invites. So the only thing guests received was our “Save the date” months prior. With the save the date, we sent out a little note about possibly having to postpone depending on what the situation is. So my question is, do I have to send something out to everyone in the mail again? A formal type like another change the date, but I don’t know the actual date yet since we are still working with the venue? Or do I wait? In reality, we plan to elope on our date 10/10/20, then do a vow renewal and reception (like a wedding) on our 1 year anniversary since we have already paid off the 250 guest wedding. I kind of feel obligated to send something out, but there’s no more “normal” during all of this. Or should I wait to let everyone know we eloped and save the date for a vow renewal? Jut looking for all your thoughts here. I know it’s crazy times and lots of unknowns so looking for some support or find what you all have done.