The simplest visit is to use the day-use area, change, and head for the water. The protected shallows are the main draw, especially in summer, but this is not a one-activity stop. The beach also suits a slow walk, sandcastle building, kite flying, and exploring the coast. Kayaking and paddleboarding are promoted here too; if you already have the gear, the sheltered water gives you another way to spend time on the bay.
Five kilometres is a lot of shoreline, so a walk can be as short or as long as you like. Keep the day loose rather than treating the full length as a route to finish. The reward is the steady change between pale sand, shallow water, and the low rocky islands offshore. If you want a big cliff view or a strenuous outing, this is the wrong kind of stop; come for the open shore and the chance to settle in.