We will be starting at St. Marks Saturday morning also. I am planning to see all 4 lighthouses, plus St. Joseph on Saturday so we have Sunday to be lazy. Since I am traveling with 3 non-lighthouse people, I figure I will nice and miss Pensacola this time. Does anyone know if all 4 lighthouses in the challenge will be open for climbing? I am wondering if my legs will hold out and if I should chose which to climb.