I don't expect a return to D2D ministry any time soon. I think the cart witnessing will return however, after all it's up to the public if they want to approach the witnesses, a safer situation than calling at people's doors.
Many witnesses I know are dreading having to go back to the KH. Not just the Covid problem but not fancying turning out on a cold wet night and then having all the problems of finding a parking space reasonably near to the KH.
George