I know we are not going to be able see all the Big Island has to offer in 3.5 days, but need advise on how to see all we can. We will be in Oahu the 7 days before so don't mind skipping out on some of the beach activities to do other things that are only on the Big Island. We are arriving in Kona on a Friday morning. I wish it was Hilo, but it isn't. Our plan is to take a leisurely drive to Hilo and visit the sites that do not involve getting wet on the way. We will stay in Hilo Friday night and get up early Saturday to spend the day at the National Park. We would really like to take the tour to the top of Mauna Kea and was thinking about leaving the park early enough to do so. I think they pick up from the visitor center around 5 pm. We'll stay Saturday night in Hilo and head back to Kona Sunday am unless we need to go back to the National Park to finish seeing everything. Our flight out leaves Monday pm so have part of Sunday and all day Monday in Kona. Is the tour worth $185 / ea? There will be 4 of us. Is this too much to fit in?