For a start your page titles are woeful. I'm sure we've discussed pagetitles in the past
Who is going to be searching for Chaz Gallery of Photos (your gallery pagetitle)
Try title - MyCounty Genre Photographer MyTown:
Giving these keywords all inside your page titles.
title - MyCounty
title - MyCounty Genre
MyCounty Genre
MyCounty Genre Photographer
Genre Photographer MyTown
Photographer MyTown
Genre Photographer
Photographer MyTown
Photographer
Your theme might not make this easy (mine does) but even if it doesn't it's surely worth the effort.
You don't have much text on the site, you need to make it work very hard. Your images are doing no work, Alt tags, titles and descriptions are free SEO keywords that users don't have to read. No-one is searching for mg-137-copy, but some people might search for 'Devon Bridal Portraits'. There's even an argument that your site isn't DDA compliant as screen reader software has no description of the images to give a blind user.
SEO isn't 'easy' but it actually is 'simple'. People overthink it, but you're supposed to be feeding your readers and Google information. Ask someone who doesnt know you what the text on the website tells them

. You'd be surprised how much you've taken for granted, and how easy it is to fix.
No-one is going to be searching for iconic wedding photo's but they might be searching for beautiful ones / cheap ones / relaxed ones / modern ones / great ones? Like I said
Simple