Unfortunately, you will not be able to participate in Sunrise Safari if you are not staying concierge level the night before safari takes place.

You do need to send them an e-mail or call them about keeping your ADRs the way they are though. I lost a few ressies once because our resorts and dates were changing. It's like the ressies cancel if you cancel the concierge room.

They may keep the ressies out of courtsey, but they can give you the confirmation #s so you can make any changes if you need to. I'm sure they wouldn't mind doing that at all.
If you ever get a chance again in the future - do a concierge stay and participate in one of the safaris. We really enjoyed both of them.
I shouldn't have peeked at this thread. I'm seriously homesick.