Honeymoon with or without baby

We had been planning on keeping our son wth us for our honeymoon trip, since all our parents work full time and we had no one who could care for him. But my FMIL just told us that she's planning on taking 10 days off after the wedding, and would love to have Brady stay with her and FFIL during that time so we can honeymoon just the two of us. I'm not 100% sure yet; he's never been away from both of us for a full night. But I think a private hm would be really nice, and they are his grandparents, after all! He knows and loves them, and they adore him. What do you ladies and gents think? Also, any tips on getting a little one ready to stay with grandparents for the first time? He'll be nearly 2 at the wedding.