A couple of months ago I actualy decided to make an effort and unlock the other ones. They aren’t difficult. I did it with a sub 80 alt just so I could at least get level exp out of it while doing it. It just takes a chunk of time and a LOT of running around. I think it just took me a couple of days of messing around for each one.
There are plenty of websites out there that will tell you exactly what you need to get the achieves that unlock the campsites.