Hey Russ,
First and foremost though Mate,,,, Have you got yourself a PLB yet ? (very cheap insurance compared to not having one)
Secondly,, I have a Garmin that I bought and got the top of the range model at the time,,,,, (but really only needed the basic model).
If your in the vicinity, drop in and check it out.
If you think it'll help you, you can have it for your Cape trip, cos I'm not planning on needing it in the near future.
I do not fear death itself... Only its inopportune timing!
I've come to realize that,,,,, the two most loving, loyal, and trustworthy females in my entire life were both canines.