Very good detailed description! Thanks!
I too have the power switch that turns on/off the water pump, located in the plumbing chase and accessible from the outside. There is an outside shower faucet and hose, I suppose for rinsing the plumbing area; I wouldn't use it to shower with.
My antifreeze suction hose and valve is located in the under bed storage area, mainly accessible from the outside, but it can be accessed from the inside with a little manuvering of bedding and bed boards, which I wouldn't want to do.
I could divert the antifreeze suction valve and hose more forward and into the water pump area, with a little work; I'm seriously considering this task.
For now, I'm glad to have the ability to add water from a jug/container. In th future, I will probably and a more suitable tank and add the ability to fill from the inside of the cabin.
Thanks again!