Reef Riders is located inside the Fonatur marina. There are bathrooms, rinse showers, and even a restaurant (closed on Sunday) located here if you want to grab a bite to eat if you are doing morning and afternoon dive trips. If you are arriving by private car there is a lot of parking available, and plenty of taxis for as well for your return trip if needed. Google Map link

If you are driving a car there is plenty of parking.