@KDAD the Islander is literally a 5 minute car ride away from the Bonnie Castle dive site. There is a parking lot and gazebo with picnic table to even get ready at, both of which are about 15 feet from the ramp into the water. You could pretty much show up and roll out of your car as long as the small lot isn't full.
Site Details:
Islander
The wreck is in about like 40 feet of water about 50-ish feet straight out from the ramp. A lap or two around the wreck and you'll have seen it all. You can also follow a marker line going NE on the river bed from the wreck to "the restaurant" which I think is in about 60' of water IIRC. It's a few hundred yard swim, if that, and is just some patio chairs/tables down there with a fake skeleton having a drink.
I'm not going to say this is the most impressive dive ever, but I enjoyed it as the beginner I am. If you're doing Bonnie Castle already, it's worth the short drive.