El Cid. There is far less left of it since Wilma, and no boat dive will take you there. You'll have to get there on a shore dive, assuming that they let you in there at all if you're not a guest of the hotel.
I'm sure after Wilma there's not much left, there were HUGE pieces of cement washed up on the shore in that area after the hurrican. Dive with Martin's old shop was under a lot of it.
There used to be a huge anchor out there also,
but again, no promises
If the hotel won't let you use their dive op to rent tanks, you can go to DWM, their shop is located just at the end of the International Pier, right next to El Cid (south), and get tanks from them and enter the water by Senor Frogs and head out to Airplane flats and see what's left.
You could also rent tanks from one of the dive ops just north of El Cid, Papa Hogs, Scuba Shack?, maybe a couple others? and attack from the north.
That day's currents may help make the decision.
We've devised several schemes to get back out there, we used to stay at La Ceiba (El Cid), and this was a regular shore dive for us, so we've wanted to get back after the hurricane, but the first year they wouldn't allow any shore diving in the area due to too much debris and last year we just didn't make it. So we are shooting to give it another try this year.
Before Martin passed away he used to take people on dives on the International Pier, I think he had to get special permission from harbor patrol and only do it on days when no ships were in. I always wanted to do that with him, pier dives can be very cool.