Surge Protectors?

I use both Hughes Autoformer booster near the power supply pedestal and then Surge Protector to the RV. I also use the 50amp plug when avl. ..reduce it down to a 30amp . It seems to be a cleaner power connection at the 50amp plug. Maybe because it gets used less often than the 30.

https://www.rv.net/forum/index.cfm/fuseaction/thread/tid/28543300/srt/pa/pging/1/page/1.cfm