I carry two 42 gallon fresh tanks in my trailer and a 30 gallon rolling gray dump tank. A transfer pump in the trailer refills my TC or allows me to hose off toys before stowing them. We only extend dry camp in above freezing weather so don't worry about frozen water in the trailer and will shower outside to reduce the fill rate of the gray tank. I was never in the Navy and enjoy my long hot showers. The trailer also carries an additional 100 lbs of LPG in addition to the 60 lbs in the TC to run the generator and those hot showers.
We were spoiled with a TH prior to having the TC and this gives us similar capacities (except for that 5.5KW Onan with 40 gallon tank that could power shop tools).