I only very rarely take a bath - most of the time I just don't have time for it. I take a quick shower to clean off and then it's back to work. So dedicating the time to a full bath is maybe a quarterly event if even.

Summer will be here soon Jilly and you'll be able to relax in your back yard in your tub

An option is to heat a large pot of water on the campfire - you can then fill a bathtub sized item with cold water plus that and come out with a reasonable middle ground.