If you are experienced divers and comfortable diving you can always do some dives on your own. Many are better done with a guide though so you can see it all. We have done both and have tried to do a rendezvous dive each trip just to get a full tour of a site. It also makes it easier for us to do on our own later. But the guides available to the sites make many of them pretty easy. Indians of course is a must do and very simple to do on your own.

The wreck of the Rhone is another great site.

I could go on and list sites over and over, but you should just pick up the guide and look over them. We've done many (if not most) of the sites that area near the common anchorages.