It really is a personal choice. Surfing the Pacific Northwest made it a “necessity” for me because there were plenty of days I don’t think I would have gone if I couldn’t fill my wetsuit before I went out and then again when I was done. FWIW the only reason I knew it would be a necessity for our build is that we were coming from a travel trailer that had one and and outside shower. The old sayings are very true: “If you never had it, you never know what your you missing and everything is great”, or after you get it “how did I ever live without it?”
Technically nothing is a necessity except food/water. Everything else could be considered a “luxury” but they sure make life A LOT easier and much more comfortable The level of luxury you choose for yourself is a very personal decision.
Surfer putting hot water into wetsuit before going out...great!...I was a professional diver on northcoast of CA; went into campground shower and filled wetsuit with hot water or used a carboy with hot water to flood suit before entering 50 degree water for 6 hours..
Oh and like surfers, we divers also had our onboard wetsuit heaters...thanks to lots of coffee, cold and hyperbaric conditions the heater had an endless supply of hot water [actually you have a net loss of calories when you use that 'natural heater'; but damn does it feel good!].
Back to FWC...
I found a great 7 gallon drinking water grade plastic jug that we use for extended dry camping; with that we can get two weeks easily, with tight water economy even longer.
Lots of benefits for the FWC hot water heater as have been listed on this thread...plus it is built in and custom fit to the FWC model...and done right.
Phil
Edited by Wallowa, 25 April 2020 - 02:19 AM.