I've done this in the sense that I've had a 1 BR opening up to a 2 BR and vice versa several times. How I handled it and how I'd suggest is this. First you check to see if it's possible, at BWV that's mean having them all the same view type. You couldn't link a BW view studio to a 1 BR standard view. Then you make the request on both reservations to have them together and you make the same request at check in (not arriving late). Don't put any other requests in if possible because any other additions affects your chances. Then you hope. It's been my experience that this is one area of requests where
DVC tends to do well in.