Stick with your plans. As said before the child will not remember that you were not there, certainly not at two years of age. My four year old grandaughter has her birthday party next weekend, and I will not be there. Firstly it is a bit too far, and secondly my daughter realises that with lots of four year olds running around, it is a bit too much for nanna's. her other grandparents will also not be there even though they do not live so far, but because it is a bit too much. I went visiting last week instead.