As it takes 4 hours approx to get the lodging, you should decide if depart must be at 3pm or early in the morning.
If you decide to drive early, you will have some time to maybe make a short ride in the afternoon all around Huacho valley.
To avoid the heath, you must start as early as possible. From the starting point it can take near to 3 hours to get to Caral Citadel. After the visit, the way out is ride back to the coast.