It is entirely a personal choice I feel ... So do whatever feels right for you!!!!
I am a bit out there so I am on the verge of putting it up on my Facebook page - I have told the key people in my life but I was thinking I could just post info once and it would minimize calls.... Some times I just get to a point where I don't want to talk about it - I figured I could post it once and be done with it!!!
My niece was in Melbourne when she went through her treatment and it was an easy way for me to keep track of her progress and send messages ...
My husband will disagree as he hates face book ...
It is your choice and your decision - if anyone disagrees that's their problem not yours :-)
Do what feels right!!!
Hugs
Chris