This is what I got and I love it.

ProgressiveIndustriesEMS-PT50X...https://www.amazon.com/dp/B01N9MOY7B?ref=ppx_pop_mob_ap_share

It does more than just stop surges. We were plugged into a site and the power kept going off. Went out to see what was up and the meter was reading 135/136v which is more than the 120v +10% being 132. Others in the park were plugged in and didn’t seem to have an issue but I wasn’t going to remove my protector just to have power. I walked around to a few empty sites and plugged it in to get a reading. I then contacted the park manager and informed them of the issue and that I wanted to move spots.

Mine is a 50A but they have lower power versions.