How can I find out if a Star Island week exchanges through RCI or II?
If it is a Wyndham points, it most likely is RCI.
Mine trades through II. The OP probably needs to call the resort. I made absolutely sure mine was with II before purchasing it.
Have you received one of the recent letters from Wyndham telling you that you have been switched to RCI and giving you the option to opt out of the switch?
Yes I have. I opted to stay with II.
Same here. Did you recieve word from II about the ACs as incentive for us to stay with II?
Nope, and there's nothing in my account reflecting an AC.