About a decade ago, a bwca.com user named Slackard created a nifty Google Earth file that one could use to overlay topographic maps with campsites & portages. In the years since, his domain where the file was hosted has gone dark.
I offer this as a convenience to anyone looking for the file. The end user accepts any & all risks associated with getting random files from random Internet sites – even if they are paddling related! =D