Answer
Treat the decision as a small piece of due diligence. For tourist-service providers, ask about clear business identity, location, current contact details, written inclusions, licences where required, insurance, recent reviews, payment terms, cancellation and a real person for problems.
Record the answers that matter to you and make sure any confirmation reflects them. This is particularly important when transport, children, equipment, dietary requirements or weather can change the experience.
Be cautious when a seller pressures for immediate payment but cannot provide written details. Confirm who is responsible for delivering the service.
Reconfirm shortly before arrival if the plan depends on a schedule, event, tide, weather condition or limited availability.