I can give you first hand information about why, in my opinion, you should have a surge protector. We were at a local rally with about 15 other coaches. During a thunderstorm that evening lightning hit a power pole on the incoming power lines to the RV park. The coaches that didn't have surge protectors lost varying amounts of electronic equipment. The worst case all the TVs, Surround Sound System, the EMS, Inverter, and several wiring harnesses were destroyed. We had a Progressive Industries Surge Protector which was destroyed, but no other damage. Our loss cost ~$130.00, the worst costs were several thousands. All coaches with surge protectors survived with minimal if any damage. Keep in mind the RV park is not responsible for this type of loss.
Jim and Lynda, (Sophie, Jake, attack trained killer Shi-Tzus :-))
2003 Fleetwood Expedition 38N 2005 Saturn Vue