“I am wanting to show some work to a great gallery in [Redacted] to see about doing an exhibit. I don’t know the first thing about how to present this to the gallerist. I have a good relationship with him and have talked about photography and bought works from him. I just want to avoid the pitfalls when I ask him to look at this new body of work.”
I would recommend bringing about 20 images in a portfolio box, same size paper, same process, consistent output, of a fully or nearly resolved cohesive body of work. Work that is tightly edited, intelligently sequenced and grounded by a well written project statement would be ideal.
Also, ask for advice, perhaps regarding next steps for the work, or sequencing and presentation preferences, which then engages and connects the viewer to the work.
Lastly, if you have two or more bodies of work then bring one other portfolio to look at in case the first one isn’t the viewers cup of tea.