Glacier Point is known as one of most stunning view points in world! It sits at 7,214 feet of elevation with Half Dome in full view! Wedding ceremonies take place at the Glacier Point Amphitheater.  The maximum guest count is 50 people. Wedding ceremonies are not permitted in July and August due to high tourism. 
Glacier Point road closes every Winter and reopens in late Spring depending on snow fall. Check out the seasonal historical opening and closing dates here.   https://www.nps.gov/yose/planyourvisit/seasonal.htm