So.....do I talk to W now or wait until after our weekend trip? Or talk to her while we're on the trip?
Well, what's been your previous experience in this sort of thing?
My H and I find things very easy to talk about on vacations (he is 1000 times more relaxed), especially on road trips. We talk about lots of things in the car, I wonder sometimes if this is easier because we are not looking at each other. He's watching to road so he's more comfortable talking.
Anyway, a trip seems like a good time to talk to me, because of that, but you seem to have pretty good awareness of when your wife is receptive.
The other thing is that if you wait til you get back, then she might think, well have you known all this time and you didn't tell me til now? So another reason I vote for the trip being the time.
Again though, I'd say that if you've had past experiences that weren't successful in that context...you need to use your own best judgment.