I am in the process of having a teardrop built so this is an interesting thread for me. My perspective is driven by 2 main thoughts:
1. I view a trailer itself as a luxury, compared to tent camping and cooking on a rock, so my list of "needs" might seem pretty basic to some.
2. I subscribe to the KISS principal. I camp between 20 and 30 nights annually, in a variety of conditions. I hate spending time fussing with a device/ system that needs a field repair, or having to maintain it at home. So electrical wires and plumbing are things to potentially break and have to fix, not bonuses in my view.
So my needs are:
-A really comfortable mattress. Whether its in a RTT or TD I want to be comfy. or more accurately, momma NEEDS to be comfy for me to be comfy.
-A convenient way to cook with high btu stove and nearby water source. I am installing a Camp Chef 2 burner cooktop hooked to a 10# external tank. Water source will be 6 gallon Reliance jug with a spigot, easily cleaned and refilled, no plumbing. Countertop space in TD galley sure beats a milk crate or set up table for food prep.
-Easy access to food storage. Cooler will be on slide out drawer, easily drained daily. Food can utensils will be easily accessible in galley storage.
-Convenient way to haul bikes, extra water etc. Will have front rack for water jugs/ fuel. Bikes will be on a swing out Yakima rack, with extra storage on roof as needed.
That's a short list but honestly, everything is geared toward my minimalist and KISS tendencies. I go camping to see and do stuff, not to repair my gear. More stuff/ high tech/ latest and greatest are not conducive to that.
So how do I "manage" not using some of the creature comforts?
-Shower. A handheld bug sprayer gets me by just fine for a few days. I typically don't go out for more than 4 nights at a time. A shower at a motel every 4th day (or when I get home) does the trick.
-Sink. Is a sink in a trailer really big enough to be meaningful? I have reached the conclusion "no". A $2 wash tub from Walmart and a 6 gallon Reliance jug does it for me. And I gain alot of space (and avoid repair headaches) by not having the plumbing and wiring to deal with.
-Heater. They are expensive, take up alot of room, have alot of wires and ducts. My 0 degree bag works pretty well. If its colder than what that can handle, I stay home.
-Solar recharger. Looked pretty hard at them, ultimately decided to go with a basic Honda generator. They are reliable, efficient, quiet, require minimal maintenance and last a long time.
-Fridge. I respect the decision by many to go the fridge route. I have stuck with the high end coolers. Again, no wires, no battery drain issues. A 10# block of ice has made it over a week in my Yeti. The big "beef" about coolers is waterlogged food. It happens. I drain mine every morning and have very few issues.