If all you afford is a surge protector than that is better than nothing.
If you can pay a little more then go with a power protector.
I did not have anything on my 1st fifth wheel and burned up 2 converters
When I bought my motorhome I went with an EMS-HW50C. I paid 284.00 including shipping. It is a hardwire type. I don't have to worry about someone stealing it. A little pricey but a great piece of mind.
You can buy boxes that protect you device from thieves but the why not install a hardwire unit. Just a thought.
Here is where I bought mine.