You can book a vendor for an event by finding one who provides the services you are looking for, serves your area, and is available on the day of your event.
Before you commit, confirm what is included, how long the vendor stays, whether setup and cleanup are covered, and what happens if you cancel. Ask food vendors for their permit or any necessary licenses.
Most vendors ask for a deposit of 20 to 50 percent and a signed agreement, with the balance due on or before the event date. Popular vendors book out months ahead, so the earlier you reach out, the better.