I am torn about my daughter's first birthday. the weekend she turns one, there is a convention that…

I am torn about my daughter's first birthday. the weekend she turns one, there is a convention that I love to staff that's out of town. everyone is tellin me I should go and celebrate her birthday the weekend before. she won't remember it. but idk I will, I'll know I wasn't there. sounds silly but idk what to do. I would love to go on vacation and bring her with me but it would be hard and her father doesn't want to see me so can't ask if he would want to come. I know he always wanted to go. but I don't want to miss her real birthday.