Smoked them, use them as a fertilizer, bury them or feed them to any animals except the aquarium fishes. You can also dump them at the dumpster. Tho my buddy sell the carps to the Asians in the cities.http://files.dnr.state.mn.us/rlp/regulations/fishing/fishing2013.pdf#view=fit&pagemode=bookmarks
I live in town and have neighbors close by. I probably won't be digging giant holes to bury my catches in. If I lived out of town and had 3-4 acres of land that would be a different story.
What do you guys do with all those carp?