During my one and only trip to BWCA, we hung, and sometimes it was tough to find a way to hang 12’ up and 6’ from a trunk. You need a large limb in an area where there are no lower limbs and no other trees nearby. There were sites where we couldn’t find such a limb and resorted to rigging lines between trees and did not achieve 12’/6’. Luckily, we were not visited by any bears and got away with it.
I’ve been in parks where the sites were equipped with either wire pulley systems (Olympic and Shenandoah NPs), an elevated log chained between trees (Yellowstone) or steel storage boxes (Grand Teton and Yosemite NPs). It’s a lot easier hanging if the site is equipped for it. But, BWCA is so huge with so many sites it doesn’t seem feasible to equip sites there with storage systems.
Which I guess leaves carrying a bear-proof container as the best solution. In the BWCA, where we averaged 8 carries a day, that’s a lot of carrying. I think I’d invest in one of the bear-proof sacks if I went there again. Hopefully, they are approved for use in the BWCA.