I can tell you from experience out there, it will amaze you how good and bad some detectors work. I'm not sure what Big 5 detector you are using, I will say that the Bounty Hunter Tracker Iv works great out there, (Why? who knows, its still analog) but not much depth. The Tracker IV is a basic model. Lower your sensitivity, be aware of all the hard salts out there, make sure you get proper permission, people have been arrested MDing out there! Avoid the historical area's.
I will say that I'm one of the crazy people that will use a $200 dollar DD coil on a $80 dollar detector in places out there. too much fine salt dust, and its a night mare if its wet out there.