Activity for Sunisa

I'm planning to do a Vietnamese style dinner, which is 8-10 courses and a boba bar later in the night. I'm not really sure how much food I should do for cocktail hour if dinner is heavy..

I'm planning to have a Catholic wedding, but the churches around me only have 2pm available. If the ceremony ends at 3 and it approximately takes 20-30 mins to get to my reception venue, then my reception starts at 3:30/4:00? Is that too early for...