Try to keep your existing posts and anchor points. Just and in some 1/2"alum tubing and if it needs to be bent,take it to a place that makes boat camper tops. That boat top place may be able to fab the ladder for you.
It was a rainy few days at Algonquin Prov park...tarps kept us dry.
Wayne --Belle River (Windsor), Ontario
2013 Sunset Trail Reserve 25RB..
2015 White Chev Silverado 2500HD 4x4 (6.0 l gasser)
2003 Mountain Star 890SBRX Truck Camper