i would focus more on the Boat Type
. depending on the age of the kids, a nice boat is paramount. true it'd be nice to "Catch Fish", but being all the boats fish the same general area, i would select a "Kid Friendly Boat"
first. The Native Sun (if running 1/2 day), and Monte Carlo are larger boats with excellent galleys for the kids to enjoy and lay down should they need to get some rest.
Don't forget, kids do get seasick too!
Something to ponder ~ JMHO...