Hey, I just did a quick search of the sunset time on October 27th and it says 6:15pm....which means no later than 6:30pm it will be dark outside, if not by 6:15pm. They just lose the light there.
So if you have your ceremony at 4:30pm-5:00pm, then you spend the entire cocktail hour with your guests, I don't feel you will have enough sun for pictures.
Generally the rule of thumb is to have your ceremony 2 hours before sunset, but that is for the ceremony and pictures, I don't believe they take into account you are having a cocktail with your guests.
Since you have a small party, I think you have some wiggle room as group pics won't take you very long, but if you want to have an hour cocktail party with your guests, then an hour or so to have photos with your husband, I would probably suggest starting at around 3:30pm ish.
4:00-5:00pm cocktail hour
5:00-6:00pm photos for you and your spouse
Here is what we did - we lost light around 5:30pm in January...
3:30-4:00pm group/family photos
4:00-5:00pm my guests had cocktails/mariachi and we did our bride/groom shots
(I had originally booked for 3:30pm but I was nervous they wouldn't be on time and we wouldn't have enough sunlight, so I bumped it up just to make myself less stressed -- of course they were on time)
Hope that helps some!
Edited by calgarybride2015, 14 September 2015 - 09:27 AM.