Traveling at 36 weeks, am I being a baby?

I rather stay within 3 hours to home that late in pregnancy. Mostly because I don’t feel like making a 6 hour trip for my SO’s sisters HS graduation and then 6 hour drive back. If I wasn’t so late in pregnancy I wouldn’t mind at all. Am I being dramatic/selfish? Should I make the trip? Or is it reasonable for me to ask him to go alone?