Just a quick dip here to check it off the list - doesn't look like a safe place for TBs to stay!
(After this I did try to dip at Afton and William O'Brien with no luck - at Afton, the cache had been moved and didn't have time to search in deep snow, and O'Brien is only accessible with cross country skis and we had only snowshoes. Will drop it off at St. Croix Boomsite)