Sound like alot of fun Bonnie! We have a double ane a single Kayak. Never dove from them but It seem like I could put my gear in front seat of the double and I could paddle from the back and it would work out well? If it was warm the wife would probably be willing to come? She could paddle the single or put the dive gear in the single tethered behind the double we were both in? A triple kayak might limit your options as for from my experience a double does not stear well when I do not have the weight of another person in the front!
If you all get a kayak let me know and maybe we can give it a try