I have a 2015 27RLS with the elite package. It has two 40 gallon fresh water tanks.
We boondock and, after having 80 gallons, I would not willing go to 40 gallons.
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.