Mine is at 9am. I picked a morning time because I had an afternoon time last year, and it was hellish. Waiting around for hours with so many stressed-out people...it really did not help my already high stress level.
As far as bringing parents/friends/spouses, I really don't think it will reflect poorly on you either way. Personally, I will be coming alone because I think having someone there with me will just make me more stressed. But this day is about YOU, so do whatever will make YOU feel like you are at the top of your game. If that means bringing someone with you, then do that. Trust me, no one here is going to judge you either way.
Good luck everyone! 😀