Carl-Erik, my place is off-grid, too, and I have been as worried as you about the mandatory essentials. I thought, until this weekend, that it would be okay to tick the essentials amenity and then offer "backup" linens that could be picked up if needed, as others are suggesting. Sorry to say that is not necessarily the case. This weekend I was a guest in an Airbnb listing (urban and not off-grid), and when I was reviewing, one of the screens had yes and no buttons beside Did you get sheets? Was there a towel per person? Was there a pillow per person? Was soap provided? Was there sufficient toilet paper?
Each of these needed to be answered before I could get to the next screen.
So we might be okay if we offer backup essentials, but we will have to be VERY clear to our guests that they had that option and refused it. Unpleasant as it is, we might have to remind them directly that "yes" is the right answer to those questions. I am sad that the system is making guests, who we know don't always read, and who often cannot find, say, blankets in a closet, into inspectors.
Adding linens adds only a 2km round trip hike to my own cleaning routine, so I have done it. You are not so lucky. Will you let us know whether you find a solution? There are so many wonderful places like yours that this platform will lose if there is none.