did you use lots of hand dyed fabrics or batiks? that would be the only reason i would worry about color running all other fabrics should be very color-fast. One color catcher should be enough...but if you used hand-dyes and are concerned about it maybe toss in an extra. i always wash my finished quilts before they go out the door, have never had one run...
except of course the one my mother has...which did not run when i washed it... but sure has for her...i don't know what she is using but gosh...it will wash the color out of anything.