I understand what you are saying... the way I originally brough it up to my husband was I asked him if he wanted to go to Branson MI with me (not explaining why). He assumed it was for fun and said something about it being a fun place (Ugh!) and why not. But, I then retreated knowing he was in a funny place at the time, very set on divorce and being 16 again. Anyhow, I retreated and didn't bring it up again. They do ask that BOTH partners be interested in attending. I didn't believe I could get that from my husband at that time. What makes you think your wife wouldn't be open to the idea? Perhaps you could pursude her that that it's not just for marriage, but even if you D, this would help you be better friends and co-parents. I used that stategy a lot with my husband during the D. It's a lot less threatening. I called it D therapy!
There is no arriving, ever. It is all a continual becoming.