Urgent Trek Booking Website

I need a clean, user-friendly website that lets our customers browse upcoming treks and reserve their spots in just a few clicks. The core focus is end-to-end booking: displaying trek dates, taking customer details, accepting online payments, and immediately updating availability on the back end... (Budget: $250 - $750 USD, Jobs: Backend Development, Frontend Development, Graphic Design, HTML, Payment Gateway Integration, PHP, Web Development, Website Design)