Surge protection only will not protect your equipment from low/ high voltage situations. Might protect if campground power is wired wrong but I'm not sure.
If you are trying not to fry your unit, get power management for the extra cash and you will never worry what if.
2014 Stealth Evo 2850- "Woodstock"
2011 Toyota Tundra Rock Crawler TRD 5.7- "Clifford"
2013 Honda Accord Coupe V6 w/Track Pack- "Julia"
Just glad to get away