Technomad - where one camps and how long one can stay there is as diverse a plan as there are nomads.
I stay for the winter on all free camping that ranges from BLM to Wildlife Refuges (on one now) to NF land.
I don't normally go way, way out back of beyond because I rely on cell service for internet (connecting to here mostly..
) and for connections to my kids - mostly so they know where I'm at! Also because way out back limits my access to sightseeing - when it takes 45 minutes to reach the main road that adds 1 1/2 hours on to a day of exploring the area...more than I'm willing to spend time wise.
I carry 10 or 11 gallons of water going in which will last me between 7 and 9 days but I rarely stay on site that long. I need to shop for fresh veggies probably about every 5 or 6 days and I like to visit National Monuments and Historical sites.
A 20 lb tank of propane will last me months if I'm not using it every day for all day heating. My house batteries are charged by solar augmented by generator every other day so refiling the gas can is one of those once a week jobs.
As to trying to figure out your usage based on current use in sticks and bricks - that's nigh on to impossible.
Just as an example - when I had an apartment I washed dishes every day in a sinkful of water. Today I wash dishes when the fork container is empty, the sink is overflowing or I run out of plates...
AND I do it in less than 2" of water. My toilet doesn't take several gallons of water to flush, it takes no water - I have a C-Head separating toilet. Showers now take less than 2 gallons of water from my solar shower unless I pay somewhere and stand under the hot water until I don't want to anymore.
When you generate your own electricity instead of paying an electric company to deliver it, you use it way differently. I have 3 lights in my whole house now. Only 1 is on at any one time. Heck reading in bed consists of using the backlighting from my Kindle not a bedside lamp. If I had to pay for my electricity now, the electric company would be bankrupt...