To answer the original question....
Berry uses co-pilots for nearly every flight. I was a captain there for about 17 months, up until 2 years ago. I had a single pilot metro rating, but they only took advantage of that on a handful of occations to reposition an aircraft, mainly from ACY to FRG, but once from HYI to ACY. I didn't mind doing it, but it was rare to fly without a co-pilot.
They are super nice people, and I really did hate to leave. They treated me with more respect than I had received before and since. I had a pretty cushy run, flying the casino junkets from FRG-ACY. The FRG base isn't around anymore, but there are casino crews in ORF and RIC. They have bases all over the country, from ORF to SAN.
I think they had about 17 metros, mostly IIIs. The IIs are used strictly for cargo or defense courier contracts. I never did those runs, so I don't know much about them.
They kinda specialize in collegiate sports charters, but I never did one of those either. I suspect because NY is so far from TX, I was really out-of-pocket for anything but casino trips.
I sure had a lot of fun working there, and met some great people.
Good Luck.
Travis