Polar Bear Provincial Park

A group of my pilot buddies are planning a trip from S.E. Michigan to Polar Bear Provincial Park in Northern Ontario (KVLL to CYPO) via the following route:

KVLL-CYAM-CYYU-CYMO-CYPO

We are planning to leave around the end of July. The area is very remote. Anyone been there / done that? Searching for thoughts and suggestions. The airplanes include a Cessna 140A, Cessna 172, Citabria, V-tail Bonanza and a Comanche. We were thinking of using the Bonanza and Comanche to haul fuel and load up the smaller planes to explore the area.

Thanks,

Daniel