Make a checklist once for each vehicle or room, then print it with tick boxes and a checked-by line, so nothing gets left behind.
Name it, pick Trip / Vehicle Checklist, Room Inventory or General, and start from example items if you like.

Cooldrinks, blankets, first aid kit: add every item with a quantity. Edit or remove anything later.

One click makes a PDF with tick boxes, quantities and a checked-by line for your guide to sign.

Start free — no credit card required.