My bridal party includes 7 girls and 8 guys. All 15 of us are staying at the hotel the night prior to the wedding day, and we'll be getting ready there. I want the photographer to catch everything (well, almost everything

). The guys shaving, girls doing make-up hair, etc... Not sure how long it's going to take 15 people to get ready at a hotel... We have to leave the hotel by 3PM, so what time should I ask my photographer to show up?