There is an intermediate step to blocking on FB. You can just unfollow. That way there stuff doesn't pop up on your feed. The downside is that you can still see them in your friends list including their online status. As you see this, you still see when they update their photo. This is what I did.
She can still like photos and see what I post to friends and family (I've thought of a "Not W & pals" list to post things re words of truthiness on relationships), but I don't see what she posts unless I go into my friends and click on her. Occasionally, I know she has posted a photo or two of the kids & then I go quickly in to see.
W doesn't have a clue that I'm not seeing her stuff, so nothing for her to react to. Still have blocked to go to if it seems appropriate later.
Maybe set up on one of the photo sharing sites, then do a group e-mail that you will post photos there.
Either way, enjoy your vacation. It is great to have all that time with the kids when we have been going through this.
Me: 50 W:43 S6, S3 M: 12 yrs. T: 17 M is bad & Not happy Bomb Mar '14 S 5 Feb '15 D Bomb 13 Apr '15 (but "no hurry") DB Coach May '15 Wants proceed on D Aug '15 Starting 1-on-1 negotiations Sept '15