I took the advice of many on this forum and bought a surge suppressor.
After a lot of research I settled on the Hughes Power Watchdog PWD50-EPO.
I like the ability to connect to the unit via Blue-Tooth.
I also like that the unit will disconnect the power to the 5th wheel if it encounters issues with the parks power.
I will say that it is very large and not inexpensive but it's way cheaper than my deductible.
I did opt for the lock. Doing what I can to keep others honest.
It's a little wild to walk out at night and see the face glowing white. The neighbors dog growled at it a couple times.

I was talking to another guy here at the RV park and he had the same unit. Nothing but positive comments.
He was actually able to use the unit to diagnose an issue with his rig a while back.

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Here is a screen shot of the app.

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Hope this info is helpful.