So close yet so far away in costa rica

My girlfriend is awesome but she doesn't know anything about waves. She booked us an all inclusive stay at a hilton resort in guanacaste costa rica which is amazing but it's on the bahia culebra which has no waves!! We're gonna be there for 4 days/5 nights in late July...i've done some research and playa grande looks like it's the closest place by road that would be good this time of year. Witch's rock is actually close but I dunno if i can charter a boat just for myself up there without it being super expensive. Anybody ever been around this area/have any advice on a car rental?

 

thanks for the advice i looked into charters in Coco and there's a place that will rent me a board and pick me up from my resort for a day trip up to ollie's/witch's for around 350 for 3 people. I just need to find somebody to share it with...I called the hotel too and they rent cars there at the resort, so my options are not so limited as i thought. I think i would rather rent a 4wd suv so then i could go anywhere, but i'm gonna be by myself so maybe not the best idea trying to get through the jungle, however kickass that sounds.