Kalui Kona
Shore excursions (the scuba one looked fun)
Transportation
We rented two bikes for ($31 together) and road up the steep hill to the Kona LDS Temple. Then road 5 miles down the cost to the nice beaches and body surfed in the waves, Liz got knocked down.
Walk to Ali'i Drive and take the Ali'i Shuttle for $2 (never saw the shuttle)
Water, ice cream ($3)
Captain cook monument kayak
Kayak to Captain Cook
We recommend two people rent a two-person (tandem) kayak rather than two individual kayaks. With your rental, you get a soft rack that fits any vehicle, paddles, a dry bag (for cameras, wallets, etc.), a soft cooler (for lunch), and tie down straps 
for your gear. When you get to Kealakekua (view online map), offload all of your equipment from your vehicle. Make sure you bring everything you think you will need, there are is no food or water or any facilities at Captain Cook. We recommend you bring: sunscreen, hat, enough water for the day, food/snacks, shirt or rash guard to avoid the hot sun, and your snorkeling or SCUBA diving gear.
75-230 Kalani St, Kailua Kona, HI - (808) 331-8345