Central NJ here, I have a pond I go to around here that sounds a lot like this. LOTS of big bass and bluegill. I've had a lot of luck with hollow body frogs and lipless cranks. Try to find out for sure what the bass are feeding on. Check their crush plates for signs of crawdads (red deposits). Also are their teeth sharper than most? That would mean they mainly feed on baitfish. Their is also a lot of snags and downed timber in my pond so the frog is perfect. Don't have to worry about getting snagged. Just make sure you have the power to pull them out once they grab it.
Kind of crappy that people can't just take your word for it and reply with help.