Consider this moment as more of each other's right rather than a privilege. Husband and wife deserve to experience moments not worrying about the pressures of the job, or of the constant juggling of work and family that always threaten one's equilibrium. Spouses can also have the time to plan for their future together, especially when their children are all grown-ups and have their own families to attend to. Most importantly, couples will be able to rekindle the romantic flame that still ignites however it is nearing extinction with years of neglect. Maybe both are a little older now, but that is a natural occurrence.
Feelings never die, and love never compromises an existing relationship between two people in love.
So, act and plan your vacation now and reap the long-term benefits of a successful happy marriage. No promises and no guarantees, but, in matters concerning relationships, action does speak a lot louder than words.