kakashi has enough chakra to do about 6 kamui and if kakashi kamui hiruko ,sasori's inside will go with it,you do realize he can kamui an susano arrow of the size of 3 man in a fraction of second and was able to take a deidara arm while he was flying,escaping and far away...
but kakashi wont' have to waste a kamui for this,he could destroy hiruko with raikiri ,he's faster than choyi and sakura by far,sakura and chiyo destroyed hiruko pretty easily with 1 punch.
how would use his puppets properly if he can't see his target?kakashi can go anytime in the ground and use hidden mist jutsu.I'm sorry but and iron shield in front of his core isn't enough and it will only confirm his core location in additions of chakra flow,kakashi can make diversion with a bunshin clone and get close to sasori by moving underground and come to sasori just under his feet like vs pein and itachi 30%.sasori isn't able to detect if kakashi is a clone or not and the moment he touch kakashi,sasori would be paralysed by raiton bunshin ,kakashi will place a raikiri in his core while sasori will be paralysed.ther is nothing that can escape kamui,any object go with it.sasori isn't tobi,he don't have genjutsu like itachi,don't have susanoo,and isn't as fast as raikage so he can't escape from kamui .sasori's transfert technique doesn't affect the fact that he has only 1 heart and from this only one human part pass all his chakra flow and we all know sharingan's abilitie to see chakra flow .