You can expect photos to be taken. In all seriousness most photographers will contact with you if they have any requirements and depending one the shoot things will differ.
For our photo sessions we keep things pretty relaxed, we ask that the family does not wear matching clothes that is very just no. We generally leave it up to the families discretion on what they want to wear but we encourage for everyone to dress nice and formal, no ripped jeans.
You can also expect music as we like to bring a bluetooth speaker for the family to play their music, this way they can hangout and feel more comfortable. We also like to bring liquid courage for the men to allow them to relax a little and enjoy the night.
But overall you can expect a fun, easy going time where we can go efficiently have do laughs and make some memories.