When I figure out how much time to allot for photos after the ceremony I always work backwards from the exact time of sunset.
So let's say Sunset is at 7pm exactly. I would go in this order after the ceremony. Family, bridal party, couple photos.
6:35pm start bride and groom photos
6:25pm all bridal party together (bride, groom, groomsmen, and bridesmaids)
6:10pm start family (assuming immediate family and grandparents)
I don't know how long your ceremony will take but if you start at 5 I imagine that you will have plenty of time.
There are obviously a few variables after the ceremony, like, Do you want a group shot of all your guests together? Do you have split families, i.e. parents divorced? Do you want photos with a dozens of aunts uncles and cousins? Those will all obviously add time.
Another thing I like to take care of before the ceremony is photos of just the bride by herself, and photos of just the groom by himself, as well as photos of the bride with her bridesmaids and the groom with his groomsmen.
I think as long as you have a photographer who is a great communicator and good at directing people a 5pm or 5:30 start time should be plenty of time.
Star18, JR14, and adcarter41, if you guys want to post some more info about what you're thinking you'd like for photos I'd be happy to come up with a potential timeline that I know would work well for my clients.