How we dewinterize our travel trailer

So we dewinterized a few weeks ago before our trip to Charleston and just got around to editing the video. Here's a quick video of how we do it if you're interested.

https://youtu.be/gtME3b-q7W8

A question for everyone else, do you sanitize your hot water heater? I do because it makes me feel better, won't hurt anything and doesn't add too much effort. I'm not sure it's necessary, so does anyone keep their hot water heater bypassed to avoid running bleach through it?