Having 6 racks on at the same time may lengthen the time for the cook. Make sure they have space for the smoke/heat to get around each of them, so try not to have them touching. Perform the bend test on each rack before taking them out of the smoker. Pick up 1/4 end of a rack and if the rest of the rack bends like it is about to break or go 90 degrees you are done.
Do not eat any of it raw or boiled at all with water, but rather roasted with fire. Exodus 12:9