All that advice I learned here from the forum family - so thank you Pond Boss! Maybe someone on the dock totes a shotgun so when you get them close, they can help finish the job and shorten the fight.
180 grass carp for a six acre lake? You certainly weren't messing around. I know the feeling.
I think we can collectively help you here - lots of friends here that live in Ohio. Maybe you can host a grass carp roundup/tournament? I sure would love to see you hoisting some more monster YP sometime soon.