Actually nearly all the ranger's I've met when fishing all love carp and fish for them regularly. Chumming is even illegal yet I have had countless talks about what we chum with and what works and doesn't work. In my area the only sport fish that can even slightly compare is wiper which are scares or a +32 inch lake trout which isn't much a fight at all. In all my years of fishing only two rangers told me to leave the carp I just caught on the rocks to die. I told them I caught the fish and its my decision to keep, kill, or release and released it right in front of him and he left with a bit of a grudge.99% of rangers wanted the carps dead and they want to make sure they are all dead. You might get in trouble if they caught you transporting live carps. There are many concerns about transporting invasive nowadays and many states are seeking to add regulations to the laws to slow down the spreading.
When I say carp I'm not talking about Asian carp which are invasive but common carp which are native. So native that they were there way before you were born. I called my local fish and game and they don't mind people taking fish for their home aquariums even if its common carp. Commons/buffalos are wanted or even needed to have a healthy lake or river and Asian carp are the invasive monsters I think you are thinking off.