Well, there is

carp.net
carp.com
carpuniverse.com

but they specialize in fishing one at a time. Carp are very strong fighters and fun to catch. Having enough predators should help with the hatch, they are not fast swimmers. During spawn in the spring, they wallow in shallow parts of the lake, with their backs breaking the surface. Should be fun to shoot them with bow and arrow. Sorry I can't help with catching them in mass. I have seen them survive for couple of days in shallow, muddy holes after the lake was drained. Night temps approached 0 Deg C