I operated this boat back in 1970 or 1971 on Barnegat Bay looking for a clammer who was reported as overdue. Searched for him most of the night, didn't locate him. A chopper located him at first light, all was well with him, his motor broke down but he was ok.
This is what the CG boat looked like the next day. The bay was frozen from Forked River north to I don't know how far past the Sea Side (Mathis) bridge. We were breaking ice with the CG boat. That was the coldest I have ever been in my life.
A vehicle could certainly have driven over the bay then.