Jilly, I don't know how you do it. I know it's not something you choose... The week I spent in Denver when my daughter had her baby a couple of weeks ago, the yucky motel I stayed in didn't have a bathtub. I had to take showers. At least they were mostly warm but I couldn't wait to get back home to take a nice long soak in the tub.
When I was growing up we took baths in the river, or sometimes on a Sat. night (so we would be clean enough to go to church the next day) we heated buckets of water on our wood burning stove to put in the tin washtub we bathed in. this was if we were lucky. I am not making this up. There were several cabins on the ranch and only 1 had a real bathroom and that went to grandma and grandpa... us kids were out of luck on that.
it was all normal to us. It was not until I grew up did I realize how weird that was. This was the 1970's.
Go heat a big bucket of water on the stove 'till it's really hot and dump that in your tub, if you have one.