DH and I returned from our 15 year anniversary trip in March. We debated prior to going if we go solo or ask friends/family to join in. We have always traveled either with our kids or alone. We decided to extend an invitation to family, a decision that we regret now. As other people have posted, it is a personal choice. But from experience, I would go alone. We were in Hawaii for 11 days (not to mention it was the unseasonably rainiest time of all--46 inches while we were there, hail and a tornado) and in addition to Oahu tried to see Kauai as well. Our trip was ruined not only by weather but by our travel companions. Aulani is beautiful, and I hope some day to return (by ourselves or with our children) to enjoy all it has to offer. Based on this experience, we have decided, we will never travel with anyone else again.