For 8 people I’d contract a driver and expect to pay for it... DONT USE A ROUTE TAXI FOR 8 PEOPLE. I’d get a private driver. If just a one time trip, pay the money, about 5 dollars a person, one way. Going from riu to ricks is quite a haul, relatively speaking. If you took a route you’re paying almost the same. Anything more than 6 person one way is too much to me.