What is the time frame you are looking at for your family vacation? If you have plenty of time, then yeah, I agree with snooderly, let W bring it up. If time is short, wait for the best opportunity to bring it up casually. Timing is everything.
W and I are planning a trip for our 30th anniversary in June. How cool is that?!!!
M: A really long time. Crisis: 5 years. She's still worth it.
Life is never made unbearable by circumstances, but only by lack of meaning and purpose. -Viktor Frankl