If it's gpx files you're after, see if you can grab these from my google drive:
bwcaw gpx filesbwca-portage-tracks.gpx -- 1.9 MB -- 920 or so portage tracks
bwca-camp-port-wpt.gpx -- 2.4 MB -- 2,098 campsite waypoints.
The second file also contains endpoints for all of the portages, which I find annoying to have around (not to mention the silly little airplane icons). I suggest deleting those waypoints from your collection, as they seem pretty redundant, given the portage tracks in the first file.