When we went to retrouvaille I had a lot of doubts too. Although we were not separated my husband said he did not love me anymore, did ot really love me. He was having an EA, and had not stopped contact with the OW at that time. But he was willing to go, and that was the most important thing for me.
It turned our marriage around. We went in November 2011, and when my husband learned about love being a decision, he suddenly realized that there is hope in our M. And though its been really tough so far, our M has progressed to the point that we are now officially piecing.
I say go. there is nothing to lose, anyway. And as long as you can pay the 100 registration, they do not obligate you to pay anything else. The hotel and food is part of it. Maybe if it works out you can contribute later on. I intend to donate more money in the future to them, even if I did donate more than the amount of the cost of the hotel and food on the weekend itself.
When my H went, he said that he didn't even know why he was there, but the fact that he was probably meant something.
The fact that your H wants to go means something. Inside, he knows that he wants something more than what you have in your R.
Read my thread. Otherwise, I will also copy and paste what happened to us after Retrouvaille from my thread in MLC to share with everyone.
Me:49 H:45 D:12 M:14 T:18 Bomb: 6/26/10 EA: 9/3/10, fizzled out slowly, now ??? 11/5/11 Retrouvaille Finally piecing.... Its peaceful at last, but we got a looong way to go