When I was a kid growing up on Long Island Sound I used to work on Great Captain's Island. The island was (and still is) a park owned by the Town of Greenwich, CT and I would get picked up every AM by the super on the island at the police dock in town. The super had 13 lobster pots that we'd pull every day or so on our way out to the island, and we'd average 1 or two "keepers" per pot each time we pulled 'em up! So I asked him what his secret was, and he said he tries to place his pots near the trenches on the bottom, or anyplace the depth charts showed was deeper than the surrounding area.
His theory was that lobsters are basically lazy critters, and as scavengers they hang out where the food (dead critters and bits of dead critters) tends to concentrate... in the cracks and crevices.
Worked well for us! We'd band the lobster claws and stick 'em in a car below the low tide line until we got enough to take into town and sell to the market. Unless we wanted lobster for lunch. Sometimes he'd ask me to surface dive down and bring a couple up for lunch when we'd boil 'em up and scarf 'em down along with tomato salad cut hot and sweet from his garden and a couple o' nice cold Rheingolds. Man! ... That was a good time... (If you're ever bored, try swimming in deep water with an angry two pounder in each hand and no mask or fins! It's an adventure!)
So I'd recommend you look at the depth charts in your area, check out the theory and report the results.
Bon appetit!