After arriving at HIN, we'll be heading to Manoa Falls to do the hike before driving to our rental in Kailua. About how long does the hike take to do? I'd then like to see at least some of the highlights of Lyon Arboretum. About how long would this take? Isn't it right by the falls trailhead? What would be the best/safest place to park, since we'll have all our luggage in our trunk? Will we want to stay in the same parking spot to visit the Lyon Arboretum or move our car?