We can stay indefinantly. We routinely do over 3 weeks.
It helps that we have some decent tank capacity.
Black 42+42=84
Grey 42=42=84
Fresh 42+ however much we decide to bring in the truck, which can approach 200 gallons.
I don't count the water heater capacity as you can't use it without adding more water to the FW tank to replace what is used out of it.
It's just me and DW and four brittanys.
We have a tote, but rarely use it.
A pair of EU2000s and extended run tank with plenty of extra gas for them and the quads. Extra propane tanks to keep the heater going.
We never feel like we need to get back. Totally comfortable out in the boonies...But jobs curtail it at some point.