I have a PD capture pro and have really enjoyed using it. It is very effective and the ARCA plate makes it easy to set on a tripod as well. Because I'm paranoid of my camera falling, I also wear my camera's neck strap for backup, however the capture hasn't failed me yet.
These photos are beautiful! Thanks for sharing. I've been to Amethyst Lake twice now, but have never ventured out to middle basin. Fingers crossed that all the snow that the Uintas have been getting recently miraculously melts so we can get a last trip in ;)