Of course I used all the facilities in my bathroom. If I stop at a rest stop on the highway, I'll use their facility simply because it's easier to do so, and I don't start filling up the black tank before I get to my destination.
And I almost always use the shower, simply because I don't want to carry clean clothes, towel, wash cloth, shampoo, and soap with me to the bath house. Sometimes I will use the CG shower if it means being able to jump off sooner in the morning. Shower in the tub and it takes a while to dry it out well enough to store stuff while underway.
