I'm sorry you find yourself here. However , this board is a wealth of information and support.
What do you want to talk with your h about while on vacation? And you cannot control what he thinks or feels about OW. You calling or texting him will not prevent him from living in fantasyland.
I say go, have fun with your D, and enjoy every minute of your trip.
This ^^^^. You cannot control him, and he will do what he will do.
rrpfl, what were your husband's prior (prior to his affair, I mean) marital complaints? Were you aware that things had gotten this bad?
We need a little more background here in order to help you.
Also, are the counseling sessions costing you $$$$, or are they covered by some sort of EAP plan? As I'm sure you know, they're really not going to be effective as long as there's a third person in the marriage.