Yeah, public fishing areas seem to have a lot of unwanted obstacles in many places.
Since you won't have an established forage base, calculate how much feed you'll need to feed daily before you drop the cash on the 2# CC. I'm not sure how fast you want to grow them out, or to what size, but it'd be a shame to miscalculate feed requirements and lose your initial investment.
Maybe some of the guys in fish farming operations will chime in on feed requirements.