There is an inshore fishing guide in Biloxi who does these in season. Captain Brodie http://teambrodiecharters.com Looks like he takes his boat in the sound, camouflages it up, and puts out decoys. I'm not a duck hunter but that looks pretty cool. I didn't know duck hunting was big in the sound.

I visit Captain Brodie's site fairly regularly b/c his reports are awesome. If you wanna know what's biting close to shore in Biloxi, he's your guy. Also very inexpensive trips.