C.M.
My daughter is almost 6 and my huby and I just went on a cruise together.. we started telling her about it about 3 weeks before we left.. she was upset about it at first and then after talking about it for a while she was so use to hearing about it .. she didnt care anymore.. I would not wake them to say bye.. like one of the other moms said.. you are just asking for tears.. but I would however..before they go to bed I would make sure they know you will not be there when they wake up. I have very strong feelings about keeping your kids in the know.. (to an extent obviously) my dad would do that to me when I was a kid.. he would tell me until the last minute he was going to go.. and it killed me.. I just wanted a little time to prepare myself.. That is my suggestion.. another thing that helps is that you have more than one.. I think my 8 month old did really well b/c he had his sister with him.. and the other way around too.. he kept her occupied.. I hope my advise helps..even at 3 .. she understands more than you think she does.. and my daughter has proven that to me over and over again...