What to do

I'm going to Las Vegas for 4 days I have an 8 month old. While she does see her father. He has never kept her over night. My initial thought was just take her with me. But my aunt is treating me and it's all adults going. I've even considered flying my grandma out as well just so she can keep my baby if we do adult stuff. I really don't wanna leave my daughter here for four days. I'm just not comfortable with leaving her with him.

What do you guys think/suggest?