i always prefer to carry my own water from home. i know it tastes good and with a 40 gallon FW tank, it's not that much extra weight.
too many worry about the extra weight, when it's the trailer's frontal area that will reduce your mpg, more than an extra 200lbs. of weight.
unless you have a huge FW tank or a marginal tow vehicle.
Dan-Retired California Firefighter/EMT
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package
4pt Equal-i-zer WDH and 1828lbs of payload capacity