Hopefully you will need none of these options, Fleecewife! But it's good to be prepared

I thought I might share some water-saving tips from my time living off-grid, when all the water I had at my little hovel was hand-carried. (Only about five hundred yards, and flat ground, but even so.)
1. Reuse the water in the hot water bottles. (Which I still do, as a way of saving water and the processing of water, especially when on a mains supply.)
2. Freshen self using a hot flannel. You can give yourself quite a good freshen up with just half a mug of hot water. Add a slice of lemon to the water for an extra clean feel.
3. Wipe plates with kitchen roll after using and discard paper when too soiled to reuse. (Or burn on the woodstove; any fats in the food make it good for starting the fire! lol.) Leave the crocks and cutlery in used water for a soak before doing the washing up. When the soak water is too contaminated to be used for more soaking, it can be used for flushing the loo. Use minimal amounts of once-used water to wash up, then a tiny bit of clean (hot is best) to rinse off. (And collect rinsings for re-use.)
4. Set up a compost loo for wee. A bucket and some sawdust is all you really need! Have a wee, add a small handful of sawdust. If you get the balance right, it doesn't smell, and of course it's a great addition to the garden compost. If squatting over a bucket isn't appealing, you can make a seat by cutting a hole in the seat of a chair, or, for more comfort and easier cleaning, get a Kampa Khazi, which is like a regular loo to sit on (the King Khazi is the same height as a regular loo) but has a lidded bucket inside.
I had no plumbing at all, but had I had a flushing loo I would of course have flushed only when there were solids, and saved any and all used ("grey") water (no longer suitable for anything else) for flushing. Paper used for wiping after just a wee into a bin not the loo pan will reduce the need for flushing too. I guess you could also use a lidded bucket for wee, and instead of adding sawdust, then use the wee to help flush when needed.
Another option for reducing the need to flush is Popaloo bags. Poop into that, tie securely, leave it to work and then put it in the household rubbish. I use them when wild camping (or using sites with no loos) when digging a hole and burying isn't the best option. (Eg., during a pandemic, when no-one is sure if poop can carry the virus...)