How can large groups arrange private drivers or van transportation?

For groups of 15 or more, travelers report success booking private van services through WhatsApp, which appears to be the preferred contact method for advance reservations. One detailed account describes arranging a 15-passenger transfer this way, suggesting that vans of this capacity are available on the island for group bookings. The logistics are straightforward: reach out via WhatsApp to confirm vehicle size, pricing, and pickup details before arrival. While the input comments mention general transfer services for group needs, the actionable detail points to WhatsApp booking for mid-sized groups, with the 15-passenger threshold as a concrete reference point for what qualifies as large-group transport in Aruba.