As has already been said, keep it SIMPLE! Just one camera, one lens, and let it be an adjunct to your activities together, not the focus! Don't be an idiot and ruin the honeymoon by giving your camera more attention than your wife. You'll have the rest of your life together to take photo vacations alone or together; there is only one honeymoon per marriage. Don't start out your marriage by showing your wife you actually care more about something else than her.