I was in a berry grub party once, late in the life of the game, and it was perfectly serviceable. I prefer the diving beetle camp in Sauromugue if it's available. Iirc it was a linkshell party, because getting a PUG to try anything new is like pulling teeth. We always used off-the-beaten-path camps for our subjob leveling static party just to see new places and experience different things, and we ran across a lot of stinkers but also a lot of hidden gems.
I think the usage level of a particular camp probably has more to do with social network theory than any strict economic analysis of its efficiency. I mean, I'm sure we can all think of camps that are seriously awful that continue to be popular just because "that's what people do" and it can be hard to convince people to gamble their time on a camp or strat they've personally never heard of rather than take a sure thing, even if the sure thing isn't that great. By way of a parallel, Facebook sucks, but good luck getting enough of your contacts to migrate to a different service that you can extract comparable utility from it. The inverse applies to highly decent camps that continue to be unpopular.