FI and I are getting married in a major city and we've decided to provide shuttles for our guests staying at the hotel we have a block at (though, all guests are welcome to use the shuttle as long as they go to the hotel for the pick up/drop off.)
What I'm wondering is about how we should coordinate the timing for pick up before the ceremony.
According to google maps (and I've been checking every Saturday!), the hotel is anywhere between 5 and 15 minutes away from the church depending on traffic. I'm inclined to err on the side of accounting for traffic, especially because there is a city wide convention occurring that weekend.
I'm someone who generally gets to wedding ceremonies very early, but I know others don't do that. I don't want to inconvenience our guests. If it takes 5-15 minutes to get to the church from the hotel, how far in advance should the shuttle arrive at the hotel to transport guests to the ceremony?