Most of the known sites have a dive mooring and are listed in the available Dive guides, anything else will require anchoring and/or a watch crew hovering above. Some advanced sites I like and rarely see divers at : Brown Pants, the Chikuzen (check locally to see if the mooring is in place when you arrive), Grand Central, the Fearless, Twin Towers and Carvel Rock. These sites should only be done in settled weather. There are so many other sites and you can generally find something close by to dive that is protected from that day's wind & weather. Thanksgiving can be quite flat with little wind, great for diving but not for sailing, water temps in the low 80s even at 100'. BUT dive when and where you can, the weather can blow out many sites even the easy ones for several days.