Recently a member of the Alfa Group lost their MH (and pet cat) in a MotorHome Fire. There was a lot of discussion as to the correct extinguisher to use.
I contacted Mac the Fire Guy for his input. His reply shows he is an RVer, RVer SAFETY is his FIRST concern, but he wants point out that he does sell this equipment.
NOTE- We have attended Mac's Fire class at a LOW school. If you have the chance to attend one of his classes- DO SO, you will be surprised at what you will learn which could save your life.