That's a very good write up Nicepix, I am not a carp angler, just an occasional opportunist really. The bread thing is not from an expert but, I thought it might be something that not many river carp anglers would think of, applied often to commercial or still waters, they might not think it could work on moving water. I have found it can on occasions given the right opportunity..
Its an interesting option or debate, fish one place for a lot of pre baited fish or fish several places for one or two in the same time frame and accumulate the number. I have done this with barbel and done pretty well, one or two fish from several spots and shoals. However, carp are usually fewer and further spread than barbel in a river. Roving, looking using your knowledge is a nicer way to fish though than hammering one shoal all day, though maybe not as prolific. I have done both with barbel, they both have there merits but, I learned to prefer the former. Its a more interesting way to fish and you can accumulate fish.