Thoughts on the 'need' factor of a main line surge protector

I've got a hard-wired one (PI). I had a surge guard that plugged in, but I found it a pain and would often not use it. Likely at the worst times (rushing setting up in the rain etc.) Plus I camped at a couple of sites where I'd have to lay it on the ground to plug in.

Now with the hardwired one, there is no doubt I'm using it.