Ex etiquette for funeral of a parent

My high school sweetheart's father passed away. He and I are on good terms and have kept in touch here and there throughout the years. We were together for 4 years from late high school into college, but parted ways because our lives were going in different directions. I cared for him very much and he will always have a special place in my heart. His family was there for me during a very difficult time in my life and I have kept in touch with them throughout the years as well. They had even met my daughter when she was born last summer, and his mother sent a gift. My husband knows all about them, as they were all hugely important to me during a major turning point in my life. In lieu of a traditional funeral service, they are having a Celebration of Life, with musical performances, as his father was a lover of music and art. Would it be appropriate to bring my husband and daughter to the service? I fee so torn. I almost just want to ask my ex, but I would hate to put him on the spot while he is already going through enough. What would you do?

A. Go alone

B. Go with your husband and child

C. Go with just your husband and/ or just your child