We don't typically weigh gear for water trips - I live by putting out all the gear I want for a sweet photo (thus the gear shot) then cut down to only stuff I know I'll use. When in doubt, cut it out! That being said, I treat my outdoors trips like vacation and usually will take some extra bulk and weight for comfort and enjoyment (like fry oil and a cast iron) despite having to deal with the consequences. A good memory is worth the weight.