Keep every operator, DP, sound recordist and assistant with their roles, rates, paperwork and dietary needs — then let them fill in their own details. And publish a free page of your own that lands in Find crew, searchable by role, kit and city.

A primary and a secondary role, each with its own day rate, rate basis and overtime multiplier — which is how one person is a DP on one job and an operator on the next, at different money. You pick which when you add them to a call sheet.
Ask crew to fill in takes one email address per line and sends each person their own private link to a one-off web form — no account, no app, no seat. Anything you already hold comes pre-filled, except the rate, which is always asked fresh.
Every published public profile is in Find crew the moment it goes up, searchable by role, kit and city. A personal page is free on every plan; roles, services, bio, showreel, kit for hire and what you have for sale are all on it.

No. Crew and clients never need a seat or an account. They receive links: a call sheet to confirm, a form to fill in, an agreement to sign.
No. The directory lists only the pages people publish themselves. Your address book, rates and paperwork are private to your workspace.
No. Conflict detection covers equipment and studio rooms. The signals for a person being in two places are the certification warnings and the Today page's you are in N places line.
Hero and portrait, name and pronouns, location, the studio / production company / freelance badges, links, bio, a what-I-do strip, a contact card with a map, a showreel, kit for hire and anything you have for sale. Personal pages are free on every plan.
A personal page is free. Publish it, and it is in Find crew the same minute.