This custom-designed South Jersey home is private, sits on a pond and is only 20 minutes from Atlantic City. But it feels like you’re tucked into the mountains. It’s a huge, 6,000 square foot home with four bedrooms, three full and one half bathroom in Port Republic. And it sits on a 2.5 acre lot. It’s listed for $1,100,000. “It feels like you’re in your own little oasis,” said Emily Wilkins of Goldcoast Sotheby’s International Realty, the listing agent. The home sits on Mill Pond, a private pond with a creek and trails around it and a beach. The neighborhood is dotted with small cabins and la…