you already answered your question.... it depends.
If your gen is propane, you will be limited by that since your hot water, heat, AC, refrigerator and cooking use only one source of fuel - propane
If you have a diesel gen you can run it plenty since it uses only 1/3gal/hour.
If you have a propane gen if I recall it was about 2-3 times the gph and have a 13gal tank that can fill to 80%.... about 10gal useful fuel or 20hrs for the gen. Obviously you can search that for a better use rates.
Do you have solar to recharge your batteries?
As for water, again, it depends upon how long you shower or wash dishes. Most people boondocking take military showers and save water that way. The use of disposable plates can help with the water use as well as taking extra water in containers if needed.
don't be afraid to search these subjects on the forum since they have been plenty of discussion in the past, and it's still relevant
Best is to do some close by dry camping before you head out into the wilds until you figure out your personal use?
have fun on your travels!
Enjoy Life! It's later than you think. Life changes in a second. There isn't enough time for cheap booze and cheap cigars.