The only
DVC resort with connecting studios (door between them) is PVB where almost all studios there connect but that’s because the long houses are all studios. Every other resort any connecting rooms would be 1 beds and studios (which you’d book as a 2 bed lockoff).
the technical rule is the member (member card required, white or blue) and any guests on their reservation. Though during slow times they allow (don’t verify room guests) others to come up with the member as long as it is reasonable.