Overkill, as his name suggests, is an individual who has posted on this forum in the past. He "over-thought" a lot of seemingly simple questions he posted instead of just getting out there and doing it. He actually presented some interesting ideas along with some crazy ones. Of course many would have said the same thing about Albert Einstein, or Thomas Edison, so he might not be as crazy as some people think.
You never know where the gold is. It probably hasn't moved far from where the person dropped it. So if they dropped it in the dry, it is probably still there, in the wet sand, still there, in the water beyond low tide, still there. People drop good stuff all over the beach. As you will see on this forum, people find gold in the dry, wet and water. As far as pull tabs, I use a CTX 3030 which gives ferrous / conductivity numbers for each signal received. About three weeks ago I dug my first pull tab signal that turned out to be a 14k gold band, so with that thought in mind, you have to dig the pull tabs if you don't want to miss any gold. Pick a method to detect your beach. Cherry pick clear gold signals with a CTX or some other detector that narrows target signals to target identity. Of course not all gold signals will actually be gold (I find a lot of zippers with a clear gold signal) and you will miss some gold that is deep because the CTX is not 100% accurate on targets deeper than 12". Or you could use a PI to clean the beach of everything by overlapping each coil sweep and gridding the entire beach and not miss a single deep target. Whatever method you use, learn your detector, learn your beach and the seasons of sand movement and get out there to have fun, get some exercise and make memories. Happy Hunting, Beach Papa