sam, T is absolutely right..just because your wife appears to be happy, that doesn't mean she actually is. They wear masks and right now, she happy as a pig in mud because she's just gotten back from a trip and she wants to brag about it, but pretty soon, that happy little face is going to turn into a disgruntled one. Don't be fooled by any of it.
As for her FB page and photos, I wouldn't let on that I've even been there. The bragging sounds like she wants to rub it in your face, but don't take the bait...she's acting like a pre-teen right now.
I'm glad to see you are planning a trip to Bermuda. I think it's a wonderful way to celebrate the big 50! Go for it and do not think twice about it.
BTW, I would most definitely get lawyer to write up the paperwork and that way everything will be done correctly. I wouldn't go w/the mediator either. She wants to talk to you on her terms and not yours. She most likely didn't have anywhere to go but home, but this is a ploy that they use to keep us off our game.
Put your business hat on when dealing w/the separation/divorce. Leave your emotions at the door when you are dealing w/the splitting of assets, etc.
Take care of yourself.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.