Traveling at 8 months

Au
My husband and I are invited to his good friends wedding on Aug 1. 
My due date is Sept 12. It's a 5 1/2 hour drive there. Just wanted to get your thoughts on traveling this close to my due date. 
At this point I feel like it's definitley do-able.. But not sure how I'll feel in August! Just wanted to hear other peoples thoughts and experiences!