If you don't want to reserve , be there before 11 am , and should be ok . I was.You may not get full services all the time , but for 1 or 2 nights was not required. there is also overflow areas that are at various locations. I stayed at lake louise for a few days , atabaska glacier area for 1 day and jasper area for a few days. Its a long park.
don't miss the spiral tunnel for trains between lake louise and golden ,bc. There is a campground near there that has great views.
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