What time is everyone having their ceremony: earlier in the day or closer to the reception? How long do you plan your ceremony to be? Do you have any specific elements in your ceremony that you'll be doing?
An early ceremony means less time to set up and get ready (unless you wake up really early) and potentially have a large gap in between the day before the reception. Some venues, like a church, require an early ceremony. But you can take advantage of the longer sunlight hours for bridal photo sessions regardless of the time of year.
A later ceremony means more time to get ready but depending on the time of year and where you are, outdoor options are limited as it can be dark or cold in certain parts of the country or certain times of the year. But if you're in a single venue, it presents a cohesive event for your guests that doesn't take up someone's whole day.
We had ours at 5:30pm and it lasted 25 minutes including the procession. We then spent 20 minutes taking portraits with all our guests at the ceremony, which was nice as it allows us to have formal photos with everyone in attendance. It worked for us because our wedding was all held in one venue. Photos were also better since the sun is not as harsh as it would be around noon hour. We also took advantage of it's close proximity to golden hour for photos while guests enjoyed cocktail hour.