We arrive in Hilo for a 10 hr stop on the Pride of America Cruise ship. We want to take a volcano tour or hike that gets up as up close and personal with the volcano as safely possible. We want to get a lot of info about the volcano. Do we have enough time to rent a car and drive up to the Nat'l Park and if so, will we get a lot of info (are there guides up there or recorded tour CDs to rent? Should we just get a volcano tour out of Hilo? Which one is best for a fairly active 50ish couple?