We only have 27gal tanks for fresh, gray, and black. And we're going on our second-ever dry camping trip this weekend. So it's fun and useful to read this whole thread to get ideas from more experienced campers.
On our last (dry camping) trip, we saved our breakfast and lunch prep tools until after dinner for cleaning. And for minor things, we used wet wipes to clean our hands instead of using the sinks.
We're also in the mode of trying to divert as much gray water as possible to the black tank (shower warm-up water, kitchen rinse water, etc.)
