2009 335QBQ water shut off
So I've got this trailer, second season, and like it very much. I am living in it full time now, winter and summer, and would like to know if there is a way to shut the water off to the back bathroom or if need be, it and the kitchen. The reason I'm asking is that its getting cold -7 C as I type this and I would like the water off on that end so I can drain the lines and avoid freezing of the 2 hanging drain pipes while still being able to use the front bath room and shower. Unless there are any other suggestions. I only need to do this until the end of the month, after which time I will be heading south for the winter and it wont matter.
Thanks in advance