My answer is - it depends.
I've gone about 4 times to an annual 3.5 day (long weekend) writer's camp Up North in my state, run very well by the state university with the MFA program, and it has always been a good experience for me.
But that said:
Pro - 100% focus on writing and revision, and all time is around other writers; at the camp food and lodgings are provided, leaving more time for writing; the mental boost I get from being in a pro-writing, writing -intensive atmosphere (I've had great ideas by the bushel fall and hit me on the head, likely because I was in a place where that was a GOOD thing and was also not at work, where I am 99% of the time).
Cons - any programming was only as good as the writers involved, so at this place, it was MFA/academics heavy, a bit snobby, anti-genre, and most of the feedback I got was just OK (from people who wanted me to write "their" way (not "my way but better"), or didn't read anything outside of their genre, and a few weirdos there for a vacation who didn't read or write at all).
In summary it sounds like the change of setting and 24/7 focus on "writing is good" were the best parts of this for me, and much of that comes from simply not being in my day job office (which long ago ate my life).