I dont have much to add to what hikemor wrote except about coffee and showers. I use an Aeropress https://aeropress.com/. for single serves of coffee and Nanopresso https://www.wacaco.com/pages/nanopresso (think REI sells or did sell them) for espresso. You can buy pods for Nanopresso which are great but you will have to buy that attachment.
The REI sell a great solar shower, the NEMO Helios.