Fletch gave me good advice last year, I remembered, and took it to heart...and it paid off.
Leave your Lesche home.
The scoop I had was small and short enough to fit in my Garrett digital camo duffel bag. There was no issue at all during the security checkpoints in Miami.
I did look like a tool carrying around the duffel bag, but I got used to it, as nobody really said anything. I didn't let the machine leave my sight until we were allowed into our rooms.
The tender to cococay Sat am, I was the first off the boat, which was nice...right into the water I went. Water in the lagoon will be clear early, gets cloudy after a couple hours as the masses crowd the island. The scoop will be useless in some areas of the lagoon, lots of bedrock, so a mask will help, a Propointer would help too. I spent about three hours, all in the lagoon area, but there is so much more to detect. The volleyball courts and the backside of the beach, where the pines are I didn't touch. You can expect to get about 6 or 7 hours in, with lunch and breaks that you will take.
Funny thing is, no cash on the island, all seapass credit....but damn, I found more change that day than ever in my life, all US coins.
Sunday the boat brought us to Nassau, but I left the AT Pro locked in my room, as my wife was like "really"....so, got no experience in the city limits. If you were to go to Atlantis, should be ok, but anywhere else, I'd be skeered of the locals messin with me....
As for the highlight?...a gold ring with diamonds, engraved "Rodrigo"

Being on the small side, it's now my wife's toe ring.
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Good luck!