Our Karen - RetiredHappy - found this article and it's a good one. As soon as Part II comes out, we'll post the link to it also. (And as it will be a 12 part series - hopefully people will read all 12 parts).
Understanding and Preventing RV Electric Shocks, Part I
If you get nothing else out of this - please remember - if there is an on/off switch at the box to plug in - turn OFF the circuits before plugging in or out. I turn all of them off even if I'm only using one. And use one hand to do the plug in/out.