For the average 6 hour crop at a store with folks that I know, I take one medium sized tote and one toolbag. I found that packing every single thing that I might possibly use meant that I spent more time and effort packing and hauling and unpacking and re-packing and dragging and schlepping than I would spend cropping. I am too lazy to do that.
I like to use Cropper Hopper page planning pouches. I'll put in sketches, the photos I want to use and my paper. If I want to use my Cricut to make embellishments for the page, I often pre-cut them and put them in with the rest of the paper and embellies. I'll cut lengths of ribbon and select metal embellishments like frames and brads. They all fit into those pouches. I use them when I'm cropping at home, too. They keep me organized.
To select which tools and supplies I'll need, I made myself a Master List of what I need/like to have when I'm doing different tasks. The Master List is broken down into sections like, 'Stamping or Stenciling', and 'Embossing'. If I've planned a page with embossing, I make sure I pack all the things I listed under 'Embossing'. Using this system, I can pack for a crop in under 15 minutes, and I rarely forget things.
If you find yourself hauling multiple totes full of paper and tools and embellishments to a crop, you might want to stop and think about how you work at crops. It isn't supposed to be a duplicate of your scrap space at home.