If you get there as soon as the park opens. Head straight for the biggies and save the wave pool and lazy river for the afternoon when it's crowded, you should be able to get everything done by 2pm.
Since it is just 2 adults, the best place to park your belongings is at the new Crush and gusher. It's close to the lockers and rest room. There are many chairs. I can't remember seeing much shade there. There are only a few trees there. Ride Crush and gusher as soon as you can. Then head to Shark reef, then Humunga Cowabunga and the Storm slides. Take the mountain path over to the tube slides. Then take the lazy river back to your belongings and eat lunch by shark reef (closest food area to your belongings). By this time the crowds should be there, so do the wave pool and lazy river. Go home when tired.
I do not recommend the area of Crush and gusher for those with children. This area only has a small wading area by the slide. There are no splashing fountains or other things to keep the children's interest.
I also don't recommend this area for those looking for shade. If you are an adult and looking for shade, look by shark reef. There are several shaded spots with roofs here.