Getting new 5th wheel Lots of questions!

Suggest you join the Grand Design Owners Forum (not run by Grand Design). Lots of helpful folks and advice over there. As for EMS protection (electrical management system - MUCH more than a surge protector)... anyone who says they've never used one and never had a problem has just been lucky. There are many people who have lost appliances (ACs, microwaves, TVs, etc.) to undervoltage (the most common issue), spikes, or nearby lightening strikes (it doesn't matter how good the park power is in that situation). We have had a hard-wired Progressive Industries model with remote display in our Reflection since day one. It has activated and saved us damage on at least three occasions.

Rob