plander: "If you are interested you can download a GPX file to your computer and put that on a micro SD card with Garmin BaseCamp. I did that years ago and it worked fine with my eTrex. Now I just use the Gaia app on my phone with downloaded GPX or KMZ files.
FYI they have the GPX files on this site, Click here "
Plander,
Thank you for the tip. From your description it appears that I can get campsites and portage details onto my ETREX20 for free going this route. Maybe this is why PaddleNav ended up going out of business..... hard to compete on price!
If anyone stumbles across an old PaddleNav or GARMIN BWCA chip I'd still be an interested buyer. In the meantime, I'm going to follow Plander's guidance about the available free resources.
Dave