We will be staying in La Fortuna and would like to do a day trip to Tenorio National Park to see Rio Celeste, the mud pots, and hot springs. We'll have a rental car so we'll just need a guide for the park (traveling with 2 kids, 15 & 11 and don't want to get lost in the park - is that possible?). Should we hire a guide from La Fortuna to drive with us or wait until we get to Tenorio? What is the normal cost for a guide? And does anyone have a recommendation for one? Thanks in advance! Our trip is in June.