I might add that nobody know for sure what their reaction will be until the event occurs. A few years ago, I had a lifetime opportunity - join a caving group for a month of exploration in China (all expenses paid). I immediately asked my wife, standing at my side, if this was OK. She promptly said "yes." Off I went.

I returned to a spouse with a different attitude. She had spent the time mothering a one year old, and doing little else. While she wa happy to be a mother, she also had an exploratory side and also would have loved going caving (that was how we spent our honeymoon). We adjusted and got things back to normal, but I rarely bring up my dream trip to China in conversation.....

Like everything else in a relationship, you must work through these things as a team.