ROBX, if you in my shoes, would you go on the trip with her knowing that the kids would want thier mother to be there as well? I dont know how you post someelse's comment.. so I copied and pasted.
I would go on 2 trips, both without her. How will she ever experience the possibility of your loss if you're always there?
Plus in some way regardless if you admit it or not, you are using your kids as the excuse for her to come - you want her there, do you see this deep down? The part of you that's needy, insecure, wanting her so badly, hoping that maybe a trip will spark something in her to love you again the way she used to, etc. etc. etc.
Take a trip with the kids without her, go somewhere fun, take lots of pics and video and face the fear of doing things without her. You're going to have to face this sooner or later.
Then take a trip for yourself, no wife, no kids, just you. Go somewhere tropic: Dominican Republic, Mexico, Cuba, etc. Experience 7 days of sun, sand, drinking, eating without a care in the world, get some rays, build up a nice tan and treat yourself - when is the last time you did this?
What's the idea behind this?
Reclaim your individuality. Treating yourself regularly gets you used to feeling good, validating yourself internally instead of waiting for scraps & morsel of loves & affection from your wife because that's what you're probably used to. Once you start pumping up that self-esteem, self-value, self-respect to the levels that they should be at, you won't settle for crap anymore, you'll respect yourself enough to say:
"hey this isn't good enough for me anymore, if you really don't value me or the relationship you have with me, I think it's time to part ways and open up my life to someone smarter who knows what they have when they have it! Your loss not mine."